OFFSET
0,2
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 0..436
EXAMPLE
E.g.f.: A(x) = 1 + 4*x + 8*x^2/2! + 120*x^3/3! + 576*x^4/4! +...
A(x) = (1+4x)*(1+4x^2/2)^2*(1+4x^3/3)^3*(1+4x^4/4)^4*(1+4x^5/5)^5*...
MATHEMATICA
With[{nn=20}, CoefficientList[Series[Product[(1+4 x^n/n)^n, {n, nn}], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Apr 11 2020 *)
PROG
(PARI) {a(n, k=4)=n!*polcoeff(prod(m=1, n, (1+k*x^m/m+x*O(x^n))^m), n)}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Dec 19 2010
STATUS
approved