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 A134408 #2 Mar 30 2012 18:50:59 %S A134408 1,1,2,3,3,5,5,8,11,11,16,21,21,29,29,40,51,51,67,67,88,109,109,138, %T A134408 167,167,207,207,258,309,309,376,443,443,531,531,640,749,749,887,887, %U A134408 1054,1221,1221,1428,1635,1635,1893,1893,2202,2511,2511,2887,2887,3330,3773 %N A134408 First differences of A006336. %C A134408 a(n) = A006336(n+1) - A006336(n); %C A134408 a(n+1) - a(n) = A134409(n). %K A134408 nonn %O A134408 1,3 %A A134408 _Reinhard Zumkeller_, Oct 24 2007