Can you tell the next element of this history function?

It is meant and important that mathematics tag isn't here!

I save you the time to search on OEIS, you won't find it :)

PS: I did post this puzzle yesterday but I replaced it with this one with improvements :)

• 1950 $\rightarrow$ 0
• 1951 $\rightarrow$ 1
• 1952 $\rightarrow$ 1
• 1953 $\rightarrow$ 2
• 1954 $\rightarrow$ 2
• 1955 $\rightarrow$ 0
• 1956 $\rightarrow$ 1
• 1957 $\rightarrow$ 1
• 1958 $\rightarrow$ 4
• 1959 $\rightarrow$ 2
• 1960 $\rightarrow$ 3
• 1961 $\rightarrow$ 1
• 1962 $\rightarrow$ 2
• 1963 $\rightarrow$ 3
• 1964 $\rightarrow$ 3
• 1965 $\rightarrow$ 3
• 1966 $\rightarrow$ 2
• 1967 $\rightarrow$ 4
• 1968 $\rightarrow$ 5
• 1969 $\rightarrow$ 4
• 1970 $\rightarrow$ 6
• 1971 $\rightarrow$ 4
• 1972 $\rightarrow$ 5
• 1973 $\rightarrow$ 8
• 1974 $\rightarrow$ 8
• 1975 $\rightarrow$ 7
• 1976 $\rightarrow$ 9
• 1977 $\rightarrow$ 10
• 1978 $\rightarrow$ 9
• 1979 $\rightarrow$ 8
• 1980 $\rightarrow$ 7
• 1981 $\rightarrow$ 8
• 1982 $\rightarrow$ 9
• 1983 $\rightarrow$ 8
• 1984 $\rightarrow$ 9
• 1985 $\rightarrow$ 9
• 1986 $\rightarrow$ 9
• 1987 $\rightarrow$ 9
• 1988 $\rightarrow$ 9
• 1989 $\rightarrow$ 9
• 1990 $\rightarrow$ 9
• 1991 $\rightarrow$ 9
• 1992 $\rightarrow$ 9
• 1993 $\rightarrow$ 9
• 1994 $\rightarrow$ 9
• 1995 $\rightarrow$ 10
• 1996 $\rightarrow$ 9
• 1997 $\rightarrow$ 10
• 1998 $\rightarrow$ 9
• 1999 $\rightarrow$ 9
• 2000 $\rightarrow$ 10
• 2001 $\rightarrow$ 10
• 2002 $\rightarrow$ 10
• 2003 $\rightarrow$ 9
• 2004 $\rightarrow$ 11
• 2005 $\rightarrow$ 12
• 2006 $\rightarrow$ 11
• 2007 $\rightarrow$ 10
• 2008 $\rightarrow$ 11
• 2009 $\rightarrow$ 10
• 2010 $\rightarrow$ 12
• 2011 $\rightarrow$ 12
• 2012 $\rightarrow$ 13
• 2013 $\rightarrow$ 12
• 2014 $\rightarrow$ 12
• 2015 $\rightarrow$ 12
• 2016 $\rightarrow$ 14
• 2017 $\rightarrow$ 13
• 2018 $\rightarrow$ 14
• 2019 $\rightarrow$ 14
• 2020 $\rightarrow$ ?

Values: 0 1 1 2 2 0 1 1 4 2 3 1 2 3 3 3 2 4 5 4 6 4 5 8 8 7 9 10 9 8 7 8 9 8 9 9 9 9 9 9 9 9 9 9 9 10 9 10 9 9 10 10 10 9 11 12 11 10 11 10 12 12 13 12 12 12 14 13 14 14

Can you tell the next element of this history function?

It is meant and important that mathematics tag isn't here!

I save you the time to search on OEIS, you won't find it :)

PS: I did post this puzzle yesterday but I replaced it with this one with improvements :)

• 1950 $\rightarrow$ 0
• 1951 $\rightarrow$ 1
• 1952 $\rightarrow$ 1
• 1953 $\rightarrow$ 2
• 1954 $\rightarrow$ 2
• 1955 $\rightarrow$ 0
• 1956 $\rightarrow$ 1
• 1957 $\rightarrow$ 1
• 1958 $\rightarrow$ 4
• 1959 $\rightarrow$ 2
• 1960 $\rightarrow$ 3
• 1961 $\rightarrow$ 1
• 1962 $\rightarrow$ 2
• 1963 $\rightarrow$ 3
• 1964 $\rightarrow$ 3
• 1965 $\rightarrow$ 3
• 1966 $\rightarrow$ 2
• 1967 $\rightarrow$ 4
• 1968 $\rightarrow$ 5
• 1969 $\rightarrow$ 4
• 1970 $\rightarrow$ 6
• 1971 $\rightarrow$ 4
• 1972 $\rightarrow$ 5
• 1973 $\rightarrow$ 8
• 1974 $\rightarrow$ 8
• 1975 $\rightarrow$ 7
• 1976 $\rightarrow$ 9
• 1977 $\rightarrow$ 10
• 1978 $\rightarrow$ 9
• 1979 $\rightarrow$ 8
• 1980 $\rightarrow$ 7
• 1981 $\rightarrow$ 8
• 1982 $\rightarrow$ 9
• 1983 $\rightarrow$ 8
• 1984 $\rightarrow$ 9
• 1985 $\rightarrow$ 9
• 1986 $\rightarrow$ 9
• 1987 $\rightarrow$ 9
• 1988 $\rightarrow$ 9
• 1989 $\rightarrow$ 9
• 1990 $\rightarrow$ 9
• 1991 $\rightarrow$ 9
• 1992 $\rightarrow$ 9
• 1993 $\rightarrow$ 9
• 1994 $\rightarrow$ 9
• 1995 $\rightarrow$ 10
• 1996 $\rightarrow$ 9
• 1997 $\rightarrow$ 10
• 1998 $\rightarrow$ 9
• 1999 $\rightarrow$ 9
• 2000 $\rightarrow$ 10
• 2001 $\rightarrow$ 10
• 2002 $\rightarrow$ 10
• 2003 $\rightarrow$ 9
• 2004 $\rightarrow$ 11
• 2005 $\rightarrow$ 12
• 2006 $\rightarrow$ 11
• 2007 $\rightarrow$ 10
• 2008 $\rightarrow$ 11
• 2009 $\rightarrow$ 10
• 2010 $\rightarrow$ 12
• 2011 $\rightarrow$ 12
• 2012 $\rightarrow$ 13
• 2013 $\rightarrow$ 12
• 2014 $\rightarrow$ 12
• 2015 $\rightarrow$ 12
• 2016 $\rightarrow$ 14
• 2017 $\rightarrow$ 13
• 2018 $\rightarrow$ 14
• 2019 $\rightarrow$ 14
• 2020 $\rightarrow$ ?

Values: 0 1 1 2 2 0 1 1 4 2 3 1 2 3 3 3 2 4 5 4 6 4 5 8 8 7 9 10 9 8 7 8 9 8 9 9 9 9 9 9 9 9 9 9 9 10 9 10 9 9 10 10 10 9 11 12 11 10 11 10 12 12 13 12 12 12 14 13 14 14

Hints

20 10 2020

Time for an hint!

All years before 1950 are valued to -7.

Can you tell the next element of this history function?

It is meant and important that mathematics tag isn't here!

I save you the time to search on OEIS, you won't find it :)

PS: I did post this puzzle yesterday but I replaced it with this one with improvments :)

• 1950 $\rightarrow$ 0
• 1951 $\rightarrow$ 1
• 1952 $\rightarrow$ 1
• 1953 $\rightarrow$ 2
• 1954 $\rightarrow$ 2
• 1955 $\rightarrow$ 0
• 1956 $\rightarrow$ 1
• 1957 $\rightarrow$ 1
• 1958 $\rightarrow$ 4
• 1959 $\rightarrow$ 2
• 1960 $\rightarrow$ 3
• 1961 $\rightarrow$ 1
• 1962 $\rightarrow$ 2
• 1963 $\rightarrow$ 3
• 1964 $\rightarrow$ 3
• 1965 $\rightarrow$ 3
• 1966 $\rightarrow$ 2
• 1967 $\rightarrow$ 4
• 1968 $\rightarrow$ 5
• 1969 $\rightarrow$ 4
• 1970 $\rightarrow$ 6
• 1971 $\rightarrow$ 4
• 1972 $\rightarrow$ 5
• 1973 $\rightarrow$ 8
• 1974 $\rightarrow$ 8
• 1975 $\rightarrow$ 7
• 1976 $\rightarrow$ 9
• 1977 $\rightarrow$ 10
• 1978 $\rightarrow$ 9
• 1979 $\rightarrow$ 8
• 1980 $\rightarrow$ 7
• 1981 $\rightarrow$ 8
• 1982 $\rightarrow$ 9
• 1983 $\rightarrow$ 8
• 1984 $\rightarrow$ 9
• 1985 $\rightarrow$ 9
• 1986 $\rightarrow$ 9
• 1987 $\rightarrow$ 9
• 1988 $\rightarrow$ 9
• 1989 $\rightarrow$ 9
• 1990 $\rightarrow$ 9
• 1991 $\rightarrow$ 9
• 1992 $\rightarrow$ 9
• 1993 $\rightarrow$ 9
• 1994 $\rightarrow$ 9
• 1995 $\rightarrow$ 10
• 1996 $\rightarrow$ 9
• 1997 $\rightarrow$ 10
• 1998 $\rightarrow$ 9
• 1999 $\rightarrow$ 9
• 2000 $\rightarrow$ 10
• 2001 $\rightarrow$ 10
• 2002 $\rightarrow$ 10
• 2003 $\rightarrow$ 9
• 2004 $\rightarrow$ 11
• 2005 $\rightarrow$ 12
• 2006 $\rightarrow$ 11
• 2007 $\rightarrow$ 10
• 2008 $\rightarrow$ 11
• 2009 $\rightarrow$ 10
• 2010 $\rightarrow$ 12
• 2011 $\rightarrow$ 12
• 2012 $\rightarrow$ 13
• 2013 $\rightarrow$ 12
• 2014 $\rightarrow$ 12
• 2015 $\rightarrow$ 12
• 2016 $\rightarrow$ 14
• 2017 $\rightarrow$ 13
• 2018 $\rightarrow$ 14
• 2019 $\rightarrow$ 14
• 2020 $\rightarrow$ ?

Values: 0 1 1 2 2 0 1 1 4 2 3 1 2 3 3 3 2 4 5 4 6 4 5 8 8 7 9 10 9 8 7 8 9 8 9 9 9 9 9 9 9 9 9 9 9 10 9 10 9 9 10 10 10 9 11 12 11 10 11 10 12 12 13 12 12 12 14 13 14 14

Can you tell the next element of this history function?

It is meant and important that mathematics tag isn't here!

I save you the time to search on OEIS, you won't find it :)

PS: I did post this puzzle yesterday but I replaced it with this one with improvements :)

• 1950 $\rightarrow$ 0
• 1951 $\rightarrow$ 1
• 1952 $\rightarrow$ 1
• 1953 $\rightarrow$ 2
• 1954 $\rightarrow$ 2
• 1955 $\rightarrow$ 0
• 1956 $\rightarrow$ 1
• 1957 $\rightarrow$ 1
• 1958 $\rightarrow$ 4
• 1959 $\rightarrow$ 2
• 1960 $\rightarrow$ 3
• 1961 $\rightarrow$ 1
• 1962 $\rightarrow$ 2
• 1963 $\rightarrow$ 3
• 1964 $\rightarrow$ 3
• 1965 $\rightarrow$ 3
• 1966 $\rightarrow$ 2
• 1967 $\rightarrow$ 4
• 1968 $\rightarrow$ 5
• 1969 $\rightarrow$ 4
• 1970 $\rightarrow$ 6
• 1971 $\rightarrow$ 4
• 1972 $\rightarrow$ 5
• 1973 $\rightarrow$ 8
• 1974 $\rightarrow$ 8
• 1975 $\rightarrow$ 7
• 1976 $\rightarrow$ 9
• 1977 $\rightarrow$ 10
• 1978 $\rightarrow$ 9
• 1979 $\rightarrow$ 8
• 1980 $\rightarrow$ 7
• 1981 $\rightarrow$ 8
• 1982 $\rightarrow$ 9
• 1983 $\rightarrow$ 8
• 1984 $\rightarrow$ 9
• 1985 $\rightarrow$ 9
• 1986 $\rightarrow$ 9
• 1987 $\rightarrow$ 9
• 1988 $\rightarrow$ 9
• 1989 $\rightarrow$ 9
• 1990 $\rightarrow$ 9
• 1991 $\rightarrow$ 9
• 1992 $\rightarrow$ 9
• 1993 $\rightarrow$ 9
• 1994 $\rightarrow$ 9
• 1995 $\rightarrow$ 10
• 1996 $\rightarrow$ 9
• 1997 $\rightarrow$ 10
• 1998 $\rightarrow$ 9
• 1999 $\rightarrow$ 9
• 2000 $\rightarrow$ 10
• 2001 $\rightarrow$ 10
• 2002 $\rightarrow$ 10
• 2003 $\rightarrow$ 9
• 2004 $\rightarrow$ 11
• 2005 $\rightarrow$ 12
• 2006 $\rightarrow$ 11
• 2007 $\rightarrow$ 10
• 2008 $\rightarrow$ 11
• 2009 $\rightarrow$ 10
• 2010 $\rightarrow$ 12
• 2011 $\rightarrow$ 12
• 2012 $\rightarrow$ 13
• 2013 $\rightarrow$ 12
• 2014 $\rightarrow$ 12
• 2015 $\rightarrow$ 12
• 2016 $\rightarrow$ 14
• 2017 $\rightarrow$ 13
• 2018 $\rightarrow$ 14
• 2019 $\rightarrow$ 14
• 2020 $\rightarrow$ ?

Values: 0 1 1 2 2 0 1 1 4 2 3 1 2 3 3 3 2 4 5 4 6 4 5 8 8 7 9 10 9 8 7 8 9 8 9 9 9 9 9 9 9 9 9 9 9 10 9 10 9 9 10 10 10 9 11 12 11 10 11 10 12 12 13 12 12 12 14 13 14 14

Can you tell the next element of this history function?

It is meant and important that mathematics tag isn't here!

I save you the time to search on OEIS, you won't find it :)

PS: I did post this puzzle yesterday but I replaced it with this one with improvments :)

• 1950 $\rightarrow$ 0
• 1951 $\rightarrow$ 1
• 1952 $\rightarrow$ 1
• 1953 $\rightarrow$ 2
• 1954 $\rightarrow$ 2
• 1955 $\rightarrow$ 0
• 1956 $\rightarrow$ 1
• 1957 $\rightarrow$ 1
• 1958 $\rightarrow$ 4
• 1959 $\rightarrow$ 2
• 1960 $\rightarrow$ 3
• 1961 $\rightarrow$ 1
• 1962 $\rightarrow$ 2
• 1963 $\rightarrow$ 3
• 1964 $\rightarrow$ 3
• 1965 $\rightarrow$ 3
• 1966 $\rightarrow$ 2
• 1967 $\rightarrow$ 4
• 1968 $\rightarrow$ 5
• 1969 $\rightarrow$ 4
• 1970 $\rightarrow$ 6
• 1971 $\rightarrow$ 4
• 1972 $\rightarrow$ 5
• 1973 $\rightarrow$ 8
• 1974 $\rightarrow$ 8
• 1975 $\rightarrow$ 7
• 1976 $\rightarrow$ 9
• 1977 $\rightarrow$ 10
• 1978 $\rightarrow$ 9
• 1979 $\rightarrow$ 8
• 1980 $\rightarrow$ 7
• 1981 $\rightarrow$ 8
• 1982 $\rightarrow$ 9
• 1983 $\rightarrow$ 8
• 1984 $\rightarrow$ 9
• 1985 $\rightarrow$ 9
• 1986 $\rightarrow$ 9
• 1987 $\rightarrow$ 9
• 1988 $\rightarrow$ 9
• 1989 $\rightarrow$ 9
• 1990 $\rightarrow$ 9
• 1991 $\rightarrow$ 9
• 1992 $\rightarrow$ 9
• 1993 $\rightarrow$ 9
• 1994 $\rightarrow$ 9
• 1995 $\rightarrow$ 10
• 1996 $\rightarrow$ 9
• 1997 $\rightarrow$ 10
• 1998 $\rightarrow$ 9
• 1999 $\rightarrow$ 9
• 2000 $\rightarrow$ 10
• 2001 $\rightarrow$ 10
• 2002 $\rightarrow$ 10
• 2003 $\rightarrow$ 9
• 2004 $\rightarrow$ 11
• 2005 $\rightarrow$ 12
• 2006 $\rightarrow$ 11
• 2007 $\rightarrow$ 10
• 2008 $\rightarrow$ 11
• 2009 $\rightarrow$ 12
• 2010 $\rightarrow$ 12
• 2011 $\rightarrow$ 12
• 2012 $\rightarrow$ 13
• 2013 $\rightarrow$ 12
• 2014 $\rightarrow$ 12
• 2015 $\rightarrow$ 12
• 2016 $\rightarrow$ 14
• 2017 $\rightarrow$ 13
• 2018 $\rightarrow$ 14
• 2019 $\rightarrow$ 14
• 2020 $\rightarrow$ ?

Values: 0 1 1 2 2 0 1 1 4 2 3 1 2 3 3 3 2 4 5 4 6 4 5 8 8 7 9 10 9 8 7 8 9 8 9 9 9 9 9 9 9 9 9 9 9 10 9 10 9 9 10 10 10 9 11 12 11 10 11 12 12 12 13 12 12 12 14 13 14 14

Can you tell the next element of this history function?

It is meant and important that mathematics tag isn't here!

I save you the time to search on OEIS, you won't find it :)

PS: I did post this puzzle yesterday but I replaced it with this one with improvments :)

• 1950 $\rightarrow$ 0
• 1951 $\rightarrow$ 1
• 1952 $\rightarrow$ 1
• 1953 $\rightarrow$ 2
• 1954 $\rightarrow$ 2
• 1955 $\rightarrow$ 0
• 1956 $\rightarrow$ 1
• 1957 $\rightarrow$ 1
• 1958 $\rightarrow$ 4
• 1959 $\rightarrow$ 2
• 1960 $\rightarrow$ 3
• 1961 $\rightarrow$ 1
• 1962 $\rightarrow$ 2
• 1963 $\rightarrow$ 3
• 1964 $\rightarrow$ 3
• 1965 $\rightarrow$ 3
• 1966 $\rightarrow$ 2
• 1967 $\rightarrow$ 4
• 1968 $\rightarrow$ 5
• 1969 $\rightarrow$ 4
• 1970 $\rightarrow$ 6
• 1971 $\rightarrow$ 4
• 1972 $\rightarrow$ 5
• 1973 $\rightarrow$ 8
• 1974 $\rightarrow$ 8
• 1975 $\rightarrow$ 7
• 1976 $\rightarrow$ 9
• 1977 $\rightarrow$ 10
• 1978 $\rightarrow$ 9
• 1979 $\rightarrow$ 8
• 1980 $\rightarrow$ 7
• 1981 $\rightarrow$ 8
• 1982 $\rightarrow$ 9
• 1983 $\rightarrow$ 8
• 1984 $\rightarrow$ 9
• 1985 $\rightarrow$ 9
• 1986 $\rightarrow$ 9
• 1987 $\rightarrow$ 9
• 1988 $\rightarrow$ 9
• 1989 $\rightarrow$ 9
• 1990 $\rightarrow$ 9
• 1991 $\rightarrow$ 9
• 1992 $\rightarrow$ 9
• 1993 $\rightarrow$ 9
• 1994 $\rightarrow$ 9
• 1995 $\rightarrow$ 10
• 1996 $\rightarrow$ 9
• 1997 $\rightarrow$ 10
• 1998 $\rightarrow$ 9
• 1999 $\rightarrow$ 9
• 2000 $\rightarrow$ 10
• 2001 $\rightarrow$ 10
• 2002 $\rightarrow$ 10
• 2003 $\rightarrow$ 9
• 2004 $\rightarrow$ 11
• 2005 $\rightarrow$ 12
• 2006 $\rightarrow$ 11
• 2007 $\rightarrow$ 10
• 2008 $\rightarrow$ 11
• 2009 $\rightarrow$ 10
• 2010 $\rightarrow$ 12
• 2011 $\rightarrow$ 12
• 2012 $\rightarrow$ 13
• 2013 $\rightarrow$ 12
• 2014 $\rightarrow$ 12
• 2015 $\rightarrow$ 12
• 2016 $\rightarrow$ 14
• 2017 $\rightarrow$ 13
• 2018 $\rightarrow$ 14
• 2019 $\rightarrow$ 14
• 2020 $\rightarrow$ ?

Values: 0 1 1 2 2 0 1 1 4 2 3 1 2 3 3 3 2 4 5 4 6 4 5 8 8 7 9 10 9 8 7 8 9 8 9 9 9 9 9 9 9 9 9 9 9 10 9 10 9 9 10 10 10 9 11 12 11 10 11 10 12 12 13 12 12 12 14 13 14 14