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 A138567 #3 Mar 30 2012 16:50:48 %S A138567 0,1,2,1,2,1,4,3,2,3,6,1,6,3,2,3,6,1,12,3,2,9,6,5,6,3,4,9,12,1,12,9,4, %T A138567 3,6,5,6,9,2,3,12,1,24,3,2,15,6,5,12,3,8,9,6,7,12,3,4,15,12,1,18,9,4, %U A138567 3,6,5,6,15,2,3,12,1,6,15,4,3,6,5,18,9,2,15,24,5,12,3,14,9,18,7,12,9,4,15,6,7,30,9 %N A138567 Variant of A082467 if we regard 1 as a prime. %K A138567 nonn %O A138567 1,3 %A A138567 J. S. Brilleaud (jeansebo(AT)yahoo.fr), May 18 2008 %E A138567 Edited by _N. J. A. Sloane_, May 18 2008