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 A158504 #3 Mar 30 2012 18:52:03 %S A158504 2,1,3,4,6,5,7,9,8,10,12,11,13,14,15,16,18,17,19,20,21,22,24,23,25,26, %T A158504 28,27,30,29,31,32,33,35,34,36,39,37,38,40,42,45,41,43,44,46,48,47,49, %U A158504 50,51,52,55,53,54,57,56,58,60,59,61,62,63,64,66,70,65,67,68,69,72,71,73,74,75 %N A158504 A158486(n)/5. %C A158504 See A158814 for other accounts of multiples in the EKG sequence A064413. %K A158504 nonn,less %O A158504 1,1 %A A158504 _Paul Curtz_, Mar 20 2009 %E A158504 Edited and extended by _R. J. Mathar_, Apr 04 2009