A071757 Expansion of (1+x^4*C^4)*C^4, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.

1, 4, 14, 48, 166, 580, 2046, 7280, 26104, 94248, 342380, 1250656, 4591122, 16929380, 62678910, 232916400, 868434000, 3247943160, 12181647780, 45807142560, 172664906700, 652291953768, 2469325506252, 9365937951328

Offset

0,2

Links

Harvey P. Dale, Table of n, a(n) for n = 0..1000

Mathematica

With[{c=(1-Sqrt[1-4x])/(2x)}, CoefficientList[Series[(1+x^4 c^4)c^4, {x, 0, 30}], x]] (* Harvey P. Dale, Jul 19 2016 *)

Crossrefs

Sequence in context: A071745 A071749 A071753 * A082590 A085280 A007851

Adjacent sequences: A071754 A071755 A071756 * A071758 A071759 A071760

Keyword

nonn

Author

N. J. A. Sloane, Jun 06 2002

Status

approved