%I #5 May 21 2015 16:26:47
%S 2,10,33,88,245,936,5383,40832,363609,3629800,39918131,479003328,
%T 6227022997,87178293944,1307674371375,20922789892096,355687428100913,
%U 6402373705733832,121645100408838859,2432902008176648000
%N Numbers of the form n!+n^3.
%C Sum of the reciprocals = 0.6470299890164780452999873886..
%t Table[n!+n^3,{n,20}] (* _Harvey P. Dale_, May 21 2015 *)
%o (PARI) factncub(n) = {sr=0; for(x=1,n, y=x!+x^3; print1(y","); sr+=1.0/y; ); print(); print(sr) }
%K easy,nonn
%O 1,1
%A _Cino Hilliard_, Mar 02 2003