%I #2 Mar 30 2012 17:30:56
%S 1,1,2,6,24,40,720,5040,13440,362880,3628800,13305600,479001600,
%T 889574400,29059430400,1307674368000,1609445376000,118562476032000,
%U 6402373705728000,121645100408832000,115852476579840000
%N Denominator of the expansion of e^(1 + x + x^2 + x^3 + x^4).
%t Denominator[ CoefficientList[ Series[ E^(1 + x + x^2 + x^3 + x^4), {x, 0, 21}]/E, x]]
%Y The numerators are in A090754.
%K frac,nonn
%O 0,3
%A _Robert G. Wilson v_, Feb 06 2004