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 A151968 #5 Mar 30 2012 17:28:42 %S A151968 1,1,1,4,7,8,3,1,3,5,3,5,7,5,3,5,3,1,3,1,5,1,5,3,3,3,5,3,3,3,3,3,3,3, %T A151968 3,3,3,1,5,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,5,3,3,3,3,3,3,3,3,3,3,3, %U A151968 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 %N A151968 Length of cycle mentioned in A151967. %H A151968 Joseph Myers, <a href="/A151968/b151968.txt">Table of n, a(n) for n=2..1000</a> [From _Joseph Myers_, Aug 21 2009] %H A151968 <a href="/index/K#Kaprekar_map">Index entries for the Kaprekar map</a> %Y A151968 Different from A151958. %K A151968 nonn,base %O A151968 2,4 %A A151968 _N. J. A. Sloane_, Aug 20 2009 %E A151968 Extended by _Joseph Myers_, Aug 21 2009