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 A000559 M4858 N2076 #40 Apr 19 2025 10:03:57
%S A000559 1,12,110,945,8092,70756,638423,5971350,57996774,585092607,6128147610,
%T A000559 66579524648,749542556193,8733648533696,105203108066962,
%U A000559 1308549777461505,16787682400875456,221901108871482760,3018891886411332135,42230736603244134242
%N A000559 Generalized Stirling numbers of second kind.
%D A000559 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
%D A000559 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H A000559 T. D. Noe, <a href="/A000559/b000559.txt">Table of n, a(n) for n = 3..100</a>
%H A000559 P. Blasiak, K. A. Penson and A. I. Solomon, <a href="https://arxiv.org/abs/quant-ph/0402027">The general boson normal ordering problem</a>, arXiv:quant-ph/0402027, 2004.
%H A000559 R. Fray, <a href="https://web.archive.org/web/2024*/https://www.fq.math.ca/Scanned/5-4/fray.pdf">A generating function associated with the generalized Stirling numbers</a>, Fib. Quart. 5 (1967), 356-366.
%F A000559 E.g.f.: (1/3!) * (exp(exp(x) - 1) - 1)^3. - _Vladeta Jovovic_, Sep 28 2003
%F A000559 a(n) = Sum_{k=0..n} Stirling2(n,k) * Stirling2(k,3).
%t A000559 nn = 23; t = Range[0, nn]! CoefficientList[Series[1/6*(Exp[Exp[x] - 1] - 1)^3, {x, 0, nn}], x]; Drop[t, 3] (* _T. D. Noe_, Aug 10 2012 *)
%Y A000559 Column k=3 of A130191.
%Y A000559 Cf. A000558, A046817.
%K A000559 nonn,easy
%O A000559 3,2
%A A000559 _N. J. A. Sloane_
%E A000559 More terms from _David W. Wilson_, Jan 13 2000