OFFSET
0,3
FORMULA
E.g.f.: A(x) = G(x/2)^2 where G(x) = e.g.f. of A096538.
EXAMPLE
E.g.f.: A(x) = 1 + x + 3*x^2/2! + 22*x^3/3! + 377*x^4/4! + 15236*x^5/5! +...
where
A(2*x)^(1/2) = 1 + x + 5*x^2/2! + 73*x^3/3! + 2649*x^4/4! + 226881*x^5/5! + 45061213*x^6/6! +...+ A096538(n)*x^n/n! +...
PROG
(PARI) {a(n)=local(A=1+x); for(i=1, 21, A=exp(x*subst(A, x, 2*x+x*O(x^n))^(1/2))); n!*polcoeff(A, n)}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Oct 05 2011
STATUS
approved