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 A161965 #3 Mar 30 2012 18:52:33 %S A161965 4,6,4,4,6,8,4,6,6,4,10,9,4,6,4,4,4,4,8,4,10,4,12,14,4,4,10,4,6,9,12, %T A161965 8,6,4,4,6,6,6,4,18,8,4,9,4,4,9,4,14,9,4,6,6,18,8,4,6,20,4,6,8,15,4, %U A161965 10,4,4,9,8,4,16,4,6,4,6,8,6,12,4,10,4,14,4,6,6,10,10,10,12,12,4,14,4,18,16 %N A161965 Composite numbers in A161849 in the order of appearance. %e A161965 The sequence shows a(1) = A161849(55)=4, a(2)=A161849(66) = 6, %e A161965 a(3) = A161849(70)=4 etc. %Y A161965 Cf. A002808, A052369, A056608. %K A161965 nonn,less %O A161965 1,1 %A A161965 _Juri-Stepan Gerasimov_, Jun 23 2009 %E A161965 Definition simplified, sequence extended by _R. J. Mathar_, Sep 11 2009