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 A005440 M1887 #27 Oct 16 2017 20:19:05 %S A005440 2,8,54,556,8146,161424,4163438,135634292,5448798090,264689281240, %T A005440 15296907175462,1037373202178748,81588771795362114, %U A005440 7366855482991121696,756909709680583939806,87807399365909591247364 %N A005440 Coefficients of Gandhi polynomials. %D A005440 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A005440 Robert Israel, <a href="/A005440/b005440.txt">Table of n, a(n) for n = 2..275</a> %H A005440 D. Dumont, <a href="http://dx.doi.org/10.1215/S0012-7094-74-04134-9">Interprétations combinatoires des nombres de Genocchi</a>, Duke Math. J., 41 (1974), 305-318. %H A005440 D. Dumont, <a href="/A001469/a001469_3.pdf">Interprétations combinatoires des nombres de Genocchi</a>, Duke Math. J., 41 (1974), 305-318. (Annotated scanned copy) %p A005440 B[1]:= X -> X^2: %p A005440 for n from 2 to 50 do B[n]:= unapply(expand(X^2*(B[n-1](X+1)-B[n-1](X))), X) od: %p A005440 seq(D(B[n])(1),n=1..50); # _Robert Israel_, Apr 21 2016 %Y A005440 Second column in table A036970. %K A005440 nonn,easy %O A005440 2,1 %A A005440 _N. J. A. Sloane_, _Simon Plouffe_ %E A005440 More terms from _David W. Wilson_, Jan 12 2001