A071751 Expansion of (1+x^4*C^3)*C^2, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.

1, 2, 5, 14, 43, 137, 449, 1505, 5137, 17797, 62426, 221272, 791350, 2852090, 10348597, 37772095, 138592365, 510905325, 1891325190, 7028112300, 26206236570, 98023732590, 367707496650, 1382982337074, 5214154271466

Offset

0,2

Links

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

Crossrefs

Sequence in context: A060795 A071743 A071747 * A052301 A071755 A149879

Adjacent sequences: A071748 A071749 A071750 * A071752 A071753 A071754

Keyword

nonn

Author

N. J. A. Sloane, Jun 06 2002

Status

approved