OFFSET
0,3
EXAMPLE
E.g.f.: A(x) = 1 + x + 3*x^2/2! + 28*x^3/3! + 941*x^4/4! + 121696*x^5/5! +...
where
A(3*x)^(1/3) = 1 + x + 7*x^2/2! + 208*x^3/3! + 23365*x^4/4! + 9588976*x^5/5! +...
PROG
(PARI) {a(n)=local(A=1+x); for(i=1, 21, A=exp(x*subst(A, x, 3*x+x*O(x^n))^(1/3))); n!*polcoeff(A, n)}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Oct 05 2011
STATUS
approved