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 A057031 #6 Dec 01 2016 07:49:46 %S A057031 2,1,2,5,2,1,8,5,2,11,2,5,8,11,2,15,2,1,24,5,8,15,2,21,18,1,2,41,8,5, %T A057031 34,5,2,37,18,5,34,11,2,41,2,11,34,5,60,5,8,5,64,11,18,57,2,1,54,57, %U A057031 18,5,8,5,80,1,2,93,18,21,34,5,2,125,2,15,80 %N A057031 Sequence of differences of A057030. %H A057031 Peter J. C. Moses, <a href="/A057031/b057031.txt">Table of n, a(n) for n = 1..5000</a> %K A057031 nonn %O A057031 1,1 %A A057031 _Clark Kimberling_, Jul 29 2000