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 A158273 #8 Mar 30 2012 18:52:03 %S A158273 8,10,12,16,24,40,56,72,120,136 %N A158273 Indices of single-digit numbers in A061049. %C A158273 The sequence may be finite. There are no further terms between 136 and 6000000. %F A158273 A061049(a(n)) = A158270(n). %K A158273 nonn,base,less,fini %O A158273 1,1 %A A158273 _Paul Curtz_, Mar 15 2009 %E A158273 Edited by _R. J. Mathar_, Apr 04 2009