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

0,2

Links

Table of n, a(n) for n=0..24.

Crossrefs

First differences of A067294.

Sequence in context: A061058 A060795 A071743 * A071751 A052301 A071755

Adjacent sequences: A071744 A071745 A071746 * A071748 A071749 A071750

Keyword

nonn

Author

N. J. A. Sloane, Jun 06 2002

Status

approved