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A071735 Expansion of (1+x^3*C^3)*C^2, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108. 1
1, 2, 5, 15, 47, 152, 504, 1705, 5863, 20436, 72046, 256462, 920550, 3328192, 12109270, 44305245, 162911415, 601700700, 2231255070, 8304089970, 31007435970, 116130446640, 436137803400, 1642112017338, 6197239974582 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

CROSSREFS

First differences of A000782.

Sequence in context: A287275 A151280 A149914 * A148363 A148364 A172405

Adjacent sequences:  A071732 A071733 A071734 * A071736 A071737 A071738

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jun 06 2002

STATUS

approved

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Last modified December 2 13:34 EST 2021. Contains 349444 sequences. (Running on oeis4.)