OFFSET
0,2
EXAMPLE
E.g.f.: A(x) = 1 + 2*x + 3*x^2/2! + 7*x^3/3! + 37*x^4/4! + 421*x^5/5! + 11401*x^6/6! +...
A(x) = (1+x) + (1+x)*x + (1+x)^2*x^2/2! + (1+x)^6*x^3/3! + (1+x)^24*x^4/4! +...
PROG
(PARI) {a(n)=n!*polcoeff(sum(m=0, n, x^m*(1+x+x*O(x^n))^(m!)/m!), n)}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Jan 12 2011
STATUS
approved