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 A298013 #5 Jan 11 2018 00:16:15 %S A298013 0,1,8,91,1334,23413,506652,12386183 %N A298013 Differentiate the g.f. underlying A032188 and evaluate it at x=1. %C A298013 See Riordan [1980] for details. %H A298013 John Riordan, <a href="/A002720/a002720_3.pdf">Letter to N. J. A. Sloane, Sep 26 1980 with notes on the 1973 Handbook of Integer Sequences</a>. Note that the sequences are identified by their N-numbers, not their A-numbers. %Y A298013 Cf. A032188. %K A298013 nonn,more %O A298013 0,3 %A A298013 _N. J. A. Sloane_, Jan 11 2018