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 A094576 #7 Jul 29 2025 23:22:08 %S A094576 3,4,5,6,8,14,17,20,22,26,30,42,44,47,68,74,79,86,90,93,101,106,112, %T A094576 122,128,142,155,158,172,189,192,200,206,211,212,218,222,230,233,240, %U A094576 242,268,275,278,301,306,310,314,317,324,327,332,338,344,347,370,380,416 %N A094576 Numbers k with property that binomial(2k, k) / (k-2) is an integer. %H A094576 Chai Wah Wu, <a href="/A094576/b094576.txt">Table of n, a(n) for n = 1..10000</a> %t A094576 Select[ Range[421], Mod[Binomial[2#, # ], (# - 2)] == 0 &] %Y A094576 Cf. A000108, A094453, A094575. %K A094576 nonn %O A094576 1,1 %A A094576 _Robert G. Wilson v_, May 11 2004