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 A131523 #2 May 20 2014 14:52:32 %S A131523 2498,8571,9995,9998,11241,11371,11379,11398,11669,11994,12353,14285, %T A131523 14997,14998,15009,17122,19146,19996,21058,21079,21131,21372,22122, %U A131523 22413,22564,22856,23317,24006,24293,24982,24994,24995,25006,26672 %N A131523 Composite numbers, not ending with 0, sharing a 3-digit sequence with some of its prime factors. %e A131523 62564=2*2*15641. Both 62564 and 15641 contain 564. Thus 62564 belongs to this sequence. %K A131523 nonn,base %O A131523 1,1 %A A131523 _Jonas Wallgren_, Aug 24 2007