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 A163408 #10 Mar 11 2014 01:32:43 %S A163408 4,8,9,14,15,16,20,21,25,26,27,30,32,33,35,38,39,42,44,45,46,49,50,51, %T A163408 55,56,57,60,62,63,64,65,66,68,69,70,74,75,77,78,80,81,84,85,86,87,90, %U A163408 91,92,93,94,95,96,98,99,102,104,105,106,110,111,114,115,116 %N A163408 Positive integers n such that A008475(n) is composite. %C A163408 Every integer >=2 is exclusively either in this sequence or in sequence A114518. %Y A163408 A008475, A114518, A163409 %K A163408 nonn %O A163408 1,1 %A A163408 _Leroy Quet_, Jul 27 2009 %E A163408 More terms from _Franklin T. Adams-Watters_, Aug 25 2011