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 A112872 #5 Nov 25 2013 08:57:43 %S A112872 0,1,4,14,53,208,843,3494,14769,63378,275480,1210213,5365307,23973429, %T A112872 107853409,488137798,2221048540,10153825751,46617145752,214844862927, %U A112872 993601026038,4609693262811,21448031058110,100058764135997 %N A112872 First differences of A061396. %H A112872 J. Awbrey, <a href="https://oeis.org/wiki/Riffs_and_Rotes">Riffs and Rotes</a> %Y A112872 Cf. A000079, A001221, A007097, A014221, A050924. %Y A112872 Cf. A061396, A062504, A062537, A062860, A106177. %Y A112872 Cf. A109300, A109301, A111791 to A111801, A112846. %K A112872 nonn %O A112872 0,3 %A A112872 _Jon Awbrey_, Oct 24 2005, based on calculations by Vladeta Jovovic & David W. Wilson