OFFSET
0,2
COMMENTS
FORMULA
EXAMPLE
E.g.f.: A(x) = 1 + 1*x + 2*x^2/2! + 9*x^3/3! + 71*x^4/4! + ... =
exp(x + x^2/2! + 5*x^3/3! + 41*x^4/4! +... + A032188(n)*x^n/n! +...).
PROG
(PARI)
{a(n)=local(x=X+X^2*O(X^n)); sum(k=0, n, n!/(n-k)!*polcoeff((x/(2*x+log(1-x)))^(n+1), k, X))}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Apr 29 2006
STATUS
approved