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 A116651 #3 Mar 31 2012 13:21:11 %S A116651 2,2,4,5,9,20,39,76,127,309,509,1263,2621,5044,10025 %N A116651 a(n) = A116648(2^n). %Y A116651 Cf. a(n) = A116648(A000079(n)). Cf. A116650. %K A116651 nonn %O A116651 0,1 %A A116651 _Antti Karttunen_, Feb 21 2006