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 A127973 #2 Mar 30 2012 18:59:19 %S A127973 1,2,2,2,2,4,2,2,2,4,4,4,4,8,2,2,2,4,4,4,4,8,4,4,4,8,8,8,8,16,2,2,2,4, %T A127973 4,4,4,8,4,4,4,8,8,8,8,16,4,4,4,8,8,8,8,16,8,8,8,16,16,16,16 %N A127973 a(2n)=A060632(n); a(2n+1)=A048896(n)/2. %C A127973 Row sums of number triangle A127972. %K A127973 easy,nonn %O A127973 0,2 %A A127973 _Paul Barry_, Feb 09 2007