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 A151544 #6 Jun 09 2016 13:35:24 %S A151544 1,2,3,4,5,6,7,8,9,136,153,160,217,244,259,352,370,371,407,496,586, %T A151544 664,736,853,862,1009,1634,2178,2929,3233,3283,4274,4394,6514,6562, %U A151544 7154,8208,9474,10933,13154,18829,50062,54748,58618,59536,73318 %N A151544 Numbers appearing in the cycles of the "Recurring Digital Invariant Variant" problem described in A151543. %H A151544 Hans Havermann, <a href="/A151544/b151544.txt">Table of n, a(n) for n = 1..129</a> %H A151544 Eric Angelini, <a href="http://www.cetteadressecomportecinquantesignes.com/RecurDigit.htm">A Recurring Digital Invariant Variant</a> %H A151544 E. Angelini, <a href="/A151543/a151543.pdf">A Recurring Digital Invariant Variant</a> [Cached, with permission] %Y A151544 Cf. A151543. %K A151544 nonn,base %O A151544 1,2 %A A151544 _N. J. A. Sloane_, May 15 2009 based on email from _Eric Angelini_, Feb 18 2009