A118341 Self-convolution square of A108447.

1, 2, 9, 48, 282, 1762, 11488, 77270, 532239, 3735488, 26617976, 192061278, 1400453568, 10303466638, 76391703591, 570195719792, 4281169118106, 32312317899352, 245016567557504, 1865677590201192, 14259825593908356

Offset: 0

Author

Paul D. Hanna, Apr 25 2006

Keywords

• nonn

Crossrefs

Cf. A108447, A118342, A118343.

Programs

PARI

{a(n)=polcoeff((serreverse(x*(1-x+sqrt((1-x)*(1-5*x)+x*O(x^n)))/2/(1-x))/x)^2,n)}