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 A165604 #2 Mar 31 2012 13:21:19 %S A165604 1,2,1,4,6,2,2,6,0,8,6,2,0,10,6,8,12,0,12,12,1,12,6,6,12,10,0,12,18,4, %T A165604 2,2,6,16,18,0,12,14,6,16,12,8,0,18,0,12,12,2,24,22,6,20,12,0,24,16,2, %U A165604 12,30,10,12,4,0,24,18,6,12,14,12,28,18,0,2,22,0,16,24,10,24,26,0,0 %N A165604 Trisection 3n of A165601. %Y A165604 a(n) = A165601(A008585(n)). %K A165604 nonn %O A165604 0,2 %A A165604 _Antti Karttunen_, Oct 06 2009