This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A094575 #10 Jul 29 2025 23:21:40 %S A094575 2,3,5,7,16,21,25,29,41,43,46,67,73,78,89,92,105,111,127,141,154,157, %T A094575 171,188,191,205,210,211,221,229,232,239,241,267,277,300,305,309,313, %U A094575 316,323,326,331,346,369,379,415,421,430,436,441,443,451,460,461,465 %N A094575 Numbers k with property that binomial(2k, k) / (k-1) is an integer. %H A094575 Chai Wah Wu, <a href="/A094575/b094575.txt">Table of n, a(n) for n = 1..10000</a> %t A094575 Select[ Range[468], Mod[Binomial[2#, # ], (# - 1)] == 0 &] %Y A094575 Cf. A000108, A094453, A094576. %Y A094575 Contains A081767 as a subsequence. %K A094575 nonn %O A094575 1,1 %A A094575 _Robert G. Wilson v_, May 11 2004