Timeline for Number of possible sequences with at most 2 repetitions and entry $a_i \in\{1,2,3,\dots,i\}$
Current License: CC BY-SA 3.0
3 events
| when toggle format | what | by | license | comment | |
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| Sep 27, 2014 at 9:57 | answer | added | hjhjhj57 | timeline score: 1 | |
| Sep 27, 2014 at 9:24 | comment | added | paw88789 | I don't think your formula is correct. I came up with the first five values of $S_n^2$ as $1, 2, 5, 16, 61$. But $S_5^2$ would be $5\cdot 16-3^2=71$ using your recursion. However, feel free to check the value of $S_5^2$ | |
| Sep 27, 2014 at 8:52 | history | asked | Celal Bey | CC BY-SA 3.0 |