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 A158315 #3 Mar 30 2012 18:52:03 %S A158315 1,3,3,3,6,3,3,9,3,3,9,3,6,10,3,3,9,9,3,9,3,3,18,3,6,9,3,9,9,3,3,18,9, %T A158315 3,9,3,3,18,9,3,15,3,9,9,3,9,9,9,3,18,3,3,27,3,3,9,3,9,18,9,6,9,10,3, %U A158315 9,3,9,30,3,3,9,9,9,18,3,3,18,9,3,9,9,3,27,3,6,18,3,18,9,3,3,9,9,9,30,3,3,27 %N A158315 A158280(n)/7. %C A158315 A kind of core or backbone of A145511, A145501 and A145444. %K A158315 nonn %O A158315 0,2 %A A158315 _Paul Curtz_, Mar 16 2009 %E A158315 Edited and extended by _R. J. Mathar_, Apr 04 2009