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 A157763 #6 May 01 2013 21:05:53 %S A157763 9,10,9,4,4,1,10,9,10,9,4,4,1,4,10,9,10,9,4,4,1,10,9,10,9,4,4,1,4,4,4, %T A157763 1,4,4,4,1,1,1,10,9,10,9,4,4,1,10,9,10,9,4,4,1,4,10,9,10,9,4,4,1,10,9, %U A157763 10,9,4,4,1,4,4,4,1,4,4,4,1,1,1,11,9,10,9,4,4,1,10,9,10,9,4,4,1,4,10,9,10,9,4,4,1 %N A157763 First differences of A157644. %K A157763 nonn %O A157763 1,1 %A A157763 _Paul Curtz_, Mar 06 2009 %E A157763 Edited by _N. J. A. Sloane_, Mar 08 2009 %E A157763 More terms from _Jean-François Alcover_, Mar 25 2013