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 A127480 #5 Mar 30 2012 18:40:03 %S A127480 0,2,1,4,4,6,14,8,5,14,3,10,11,12,52,18,54,20,34,22,27,34,45,24,18,16, %T A127480 84,26,61,28,160,30,147,32,444,36,647,44,47,42,311,40,33,52,851,48, %U A127480 224,38,82,72,41,50,216,62,148,54,728,60,89,58 %N A127480 A131702 and A014320 interleaved. %F A127480 a(2n)= A014320(n+1). a(2n-1) = A131702(n). %K A127480 nonn,less %O A127480 1,2 %A A127480 _Giovanni Teofilatto_, Sep 12 2007 %E A127480 Formulas added, sequence extended, arbitrarily defined first term replaced - _R. J. Mathar_, Aug 23 2010