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 A130908 #16 Jan 23 2024 20:26:21
%S A130908 1,2,6,23,106,576,3622,26006,210828,1910096,19162096,211095732,
%T A130908 2534829376,32962249568,461527198056,6923249156336,110774157354832,
%U A130908 1883174989346016,33897247428278368,644048388555567536,12880972761058252896,270500465268345299072,5951010522336442007776,136873244273143429751328
%N A130908 E.g.f.: exp(x+x^2/2!+x^3/3!)/(1-x).
%F A130908 a(n) ~ n! * exp(5/3). - _Vaclav Kotesovec_, Aug 04 2014
%F A130908 D-finite with recurrence +2*a(n) +2*(-n-1)*a(n-1) +(n-1)*(n-2)*a(n-3) +(n-1)*(n-2)*(n-3)*a(n-4)=0. - _R. J. Mathar_, Aug 20 2021
%t A130908 With[{nn=20},CoefficientList[Series[Exp[x+x^2/2!+x^3/3!]/(1-x),{x,0,nn}],x] Range[0,nn]!] (* _Harvey P. Dale_, Jun 01 2014 *)
%o A130908 (PARI) x='x+O('x^66); Vec(serlaplace(exp(x+x^2/2!+x^3/3!)/(1-x))) \\ _Joerg Arndt_, Jun 01 2014
%Y A130908 Cf. A130905, A130906, A130907.
%K A130908 nonn
%O A130908 0,2
%A A130908 _Karol A. Penson_, Jun 08 2007
%E A130908 Incorrect initial term 1 removed by _Harvey P. Dale_, Jun 01 2014