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 A132959 #10 Sep 29 2017 02:49:53 %S A132959 1,3,19,109,881,7621,77785,854225,10750465,143737381,2121714761, %T A132959 33426065905,568250246305,10242445089605,197388381934801, %U A132959 4003553262384961,86010508861504385,1939950117886565125 %N A132959 Total number of all distinct list sizes in all partitions of [n] into lists, cf. A000262. %H A132959 G. C. Greubel, <a href="/A132959/b132959.txt">Table of n, a(n) for n = 1..440</a> %F A132959 E.g.f.: exp(x/(1-x))*Sum_{k>0}(1-exp(-x^k)). %t A132959 Rest[ Range[0, 20]! CoefficientList[ Series[ Exp[x/(1 - x)] Sum[(-x)^k/(k!*(x^k - 1)), {k, 25}], {x, 0, 20}], x]] (* _Robert G. Wilson v_, Sep 13 2007 *) %Y A132959 Cf. A052852, A132958, A132960, A132961, A132962, A132963. %K A132959 easy,nonn %O A132959 1,2 %A A132959 _Vladeta Jovovic_, Sep 06 2007 %E A132959 More terms from _Robert G. Wilson v_, Sep 13 2007