OFFSET
0,3
EXAMPLE
E.g.f.: A(x) = 1 + x + 7*x^2/2!^2 + 136*x^3/3!^2 + 5243*x^4/4!^2 + 337926*x^5/5!^2 +...
such that
A(x) = 1/(1 - x*A(x) + x^2*A(x)^2/2!^2 - x^3*A(x)^3/3!^2 + x^4*A(x)^4/4!^2 +...).
PROG
(PARI) {a(n)=n!^2*polcoeff(1/x*serreverse(x*sum(m=0, n, (-x)^m/m!^2)+x^2*O(x^n)), n)}
for(n=0, 31, print1(a(n), ", "))
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Mar 16 2012
STATUS
approved