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 A178656 #3 Mar 30 2012 18:52:41 %S A178656 1,2,4,5,8,13,15,21,22,35,38,41,59,61,63,87,90,92,107,110,136,144,155, %T A178656 158,165,166,215,227,232,235,240,252,254,283,286,306,316,330,360,363, %U A178656 366,386,398,408,435,437,438,459,467,483,507,530,557,560,568,571,589 %N A178656 The positions of products of 2 primes that are the differences of 2 primes in A002808. %C A178656 The positions of A124588(m)*A124588(k) in A002808. %F A178656 A002808(a(n))=A124588(m)*A124588(k). %K A178656 nonn %O A178656 1,2 %A A178656 _Juri-Stepan Gerasimov_, Jun 01 2010 %E A178656 Corrected (254 inserted) by _R. J. Mathar_, Jun 04 2010