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Max Alekseyev's user avatar
Max Alekseyev's user avatar
Max Alekseyev
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108
Special rational numbers that appear as answers to natural questions
Sep 9, 2015
68
Special rational numbers that appear as answers to natural questions
Sep 9, 2015
68
Iterations of $2^{n-1}+5$: the strong law of small numbers, or something bigger?
Oct 9, 2016
62
Relaxed Collatz 3x+1 conjecture
Sep 3, 2015
30
Proof for new deterministic primality test
Apr 1, 2023
29
Harmonic sums and elementary number theory
Dec 1, 2019
27
Simple recurrence that fails to be integer for the first time at the 44th term
Sep 27, 2017
25
Removal of non-isomorphic edges results in the same graph
Jul 15, 2014
24
When do binomial coefficients sum to a power of 2?
Jan 1, 2022
24
$3^n - 2^m = \pm 41$ is not possible. How to prove it?
Jun 29, 2010
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Sufficiently large integers can be partitioned into squares of distinct integers whose reciprocals sum to 1.
10
When is the number of areas obtained by cutting a circle with $n$ chords a power of $2$?
9
Number of labeled Abelian groups of order n
9
Explanation of OEIS:A000236 - Residue Classes
8
$2n+1$ Subsets whose cardinality is a multiples of 6