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 A153287 #4 Mar 30 2012 18:51:59 %S A153287 0,2,3,4,6,7,8,9,11,11,13,14,16,17,18,19,20,22,23,24,25,27,27,29,31, %T A153287 31,33,34,35,37,37,39,41,41,43,43,46,46,48,48,50,52,52,54,55,56,58,58, %U A153287 60,62,62,64,65,66,67,69,69,72,72,73,75,76,77,79,80,81,82,83,85,86,87,88,90,91 %N A153287 First differences of A152738. %H A153287 B. D. Swan, <a href="/A153287/b153287.txt">Table of n, a(n) for n=0,...,10000</a> %K A153287 nonn %O A153287 0,2 %A A153287 _Paul Curtz_, Dec 23 2008