A179499 E.g.f. A(x) = G(x)^2/x where G(x) satisfies: G(G(x))^2 = G(x)^2 * G'(x) and G(x) is the g.f. of A179499.

1, 4, 42, 768, 20680, 749040, 34497792, 1944626432, 130528288512, 10219233265920, 918320724657600, 93509880099305472, 10677268138244018688, 1355273477576934150144, 189834913883100796531200

Offset

1,2

Links

Table of n, a(n) for n=1..15.

Example

E.g.f.: A(x) = x + 4*x^2/2! + 42*x^3/3! + 768*x^4/4! + 20680*x^5/5! +...

Crossrefs

Cf. A179497, A179498, A179420.

Sequence in context: A266526 A140055 A221096 * A268567 A197866 A197948

Adjacent sequences: A179496 A179497 A179498 * A179500 A179501 A179502

Keyword

nonn

Author

Paul D. Hanna, Jul 31 2010

Status

approved