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 A157645 #3 Mar 30 2012 18:52:03 %S A157645 220,220,220,220,220,220,220,220,220,220,220,220,220,220,220,220,220, %T A157645 220,220,220,220,220,220,220,220,220,220,220,220,220,220,220,220,220, %U A157645 220,220,220,220,220,221,221,221,221,221,221,221,221,221,221,221,221 %N A157645 A157644(n+39)-A157644(n). %C A157645 39 220's, then 39 221's, then 40 220's, then 2 215's, then one 214, then one 215, then 2 220's... %Y A157645 Cf. A157334. %K A157645 nonn,less %O A157645 1,1 %A A157645 _Paul Curtz_, Mar 03 2009 %E A157645 Keyword:less added by _R. J. Mathar_, Nov 22 2009