A071747 Expansion of (1+x^4*C^2)*C^2, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.

1, 2, 5, 14, 43, 136, 443, 1478, 5027, 17368, 60788, 215084, 768094, 2764880, 10021721, 36546310, 133990755, 493606680, 1826192640, 6782469540, 25278252810, 94512157680, 354397639830, 1332454176924, 5022040887822

Offset: 0

Author

N. J. A. Sloane, Jun 06 2002

Keywords

• nonn

Crossrefs

First differences of A067294.