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 A096407 #2 Mar 31 2012 14:11:10 %S A096407 5,17,197,33857,1133938277,1285739650972396817, %T A096407 1653126447166808571538254964938621797 %N A096407 a(n) = f(n)/f(n-2) where f(k) = A002665(k). %K A096407 nonn %O A096407 2,1 %A A096407 _Gerald McGarvey_, Aug 07 2004, Aug 07 2004