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 A267822 #20 Apr 09 2016 16:51:22 %S A267822 1,2,2,3,7,5,3,25,22,17,72,161,89,72,50,25,22,17,10,7,5,3,2,5,624,622, %T A267822 619,614,607,597,580,558,533,483,411,6466,5983,5450,4892,4312,3715, %U A267822 3108,2494,43297,40803,37695,33980 %N A267822 First differences of A271063. %H A267822 Cody M. Haderlie, <a href="/A267822/b267822.txt">Table of n, a(n) for n = 1..1981</a> %F A267822 a(n) = A271063(n + 1) - A271063(n). %Y A267822 Cf. A271063. %K A267822 nonn %O A267822 1,2 %A A267822 _Cody M. Haderlie_, Apr 09 2016