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 A163409 #12 Mar 11 2014 01:32:43 %S A163409 4,8,9,9,8,16,9,10,25,15,27,10,32,14,12,21,16,12,15,14,25,49,27,20,16, %T A163409 15,22,12,33,16,64,18,16,21,26,14,39,28,18,18,21,81,14,22,45,32,16,20, %U A163409 27,34,49,24,35,51,20,22,21,15,55,18,40,24,28,33,22,24,16,121,63,44,35,125,18,128,46,20 %N A163409 Subsequence of composite terms of A008475. %F A163409 a(n) = A008475(A163408(n)). %Y A163409 A008475, A114519, A163408 %K A163409 nonn %O A163409 1,1 %A A163409 _Leroy Quet_, Jul 27 2009 %E A163409 More terms from _Max Alekseyev_, Oct 14 2012