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 A084465 #6 Jul 29 2017 12:41:54 %S A084465 4,5,26,7,59,42,222,328,36,197,765,30,543,594,813,1248,2932,618,519, %T A084465 2413,686,3159,6019,145,7132,1997,4587,5865,8598,2367,7303,9464,17602, %U A084465 3653,16212,8404,8329,20801,6886,18906,14619,18564,361,41378,9068,16688 %N A084465 First differences of A084449. %F A084465 a(n) = A084449(n+1) - A084449(n). %K A084465 nonn %O A084465 0,1 %A A084465 _Antti Karttunen_, Jun 02 2003 %E A084465 More terms from _David Wasserman_, Dec 30 2004