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 A020112 #6 Mar 30 2012 18:36:22 %S A020112 1,1,1,2,6,25,131,843,6275,52989,500443,5226842,59818301,744405516, %T A020112 10008118595,144561713038,2232675345795,36715105686391, %U A020112 640474621418149,11813198572823623,229701083360459335,4696111037591613053 %N A020112 Ceiling of GAMMA(n+4/9)/GAMMA(4/9). %p A020112 Digits := 64:f := proc(n,x) ceil(GAMMA(n+x)/GAMMA(x)); end; %K A020112 nonn %O A020112 0,4 %A A020112 _Simon Plouffe_