OFFSET
1,2
PROG
(PARI) {a(n) = n! * polcoeff( log( sum(m=0, n, m^(2*m) * x^m/m!) +x*O(x^n)), n)}
for(n=1, 20, print1(a(n), ", "))
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Dec 31 2015
STATUS
approved