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 A067328 #3 Mar 31 2012 13:20:07 %S A067328 1,1,1,4,4,1,28,28,8,1,256,256,76,12,1,2704,2704,816,140,16,1,31168, %T A067328 31168,9488,1696,220,20,1,380608,380608,116480,21328,2960,316,24,1, %U A067328 4840960,4840960,1486784,276544,40016 %N A067328 Scaled triangle A067327. %F A067328 a(n, m)=A067327(n, m)/A067327(m, m), with A067327(m, m)=A002001(n), n>=m>=0, else 0. %K A067328 nonn,easy,tabl %O A067328 0,4 %A A067328 _Wolfdieter Lang_, Feb 05 2002