A071738 Expansion of (1+x^3*C^4)*C, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.

1, 1, 2, 6, 19, 62, 207, 704, 2431, 8502, 30056, 107236, 385662, 1396652, 5088865, 18642420, 68624295, 253706790, 941630580, 3507232740, 13105289370, 49114150020, 184560753390, 695267483664, 2625197720454, 9933364416572

Offset

0,3

Links

Table of n, a(n) for n=0..25.

Crossrefs

Essentially the same as A026012.

Sequence in context: A033565 A094831 A033193 * A026012 A191993 A120900

Adjacent sequences: A071735 A071736 A071737 * A071739 A071740 A071741

Keyword

nonn

Author

N. J. A. Sloane, Jun 06 2002

Status

approved