A071727 Expansion of (1+x^3*C)*C^2, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.

1, 2, 5, 15, 45, 141, 457, 1520, 5159, 17797, 62218, 219946, 784890, 2823666, 10229733, 37289210, 136665195, 503301525, 1861550310, 6912114330, 25755891510, 96279420870, 360961760250, 1356920443944, 5113523451462

Offset

0,2

Links

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

Crossrefs

Sequence in context: A232208 A294502 A254534 * A148354 A364330 A151279

Adjacent sequences: A071724 A071725 A071726 * A071728 A071729 A071730

Keyword

nonn

Author

N. J. A. Sloane, Jun 06 2002

Status

approved