A118043 Column 2 of triangle A118040, which is the matrix square of triangle A118032; also equals a bisection of A118035, which is column 2 of A118032.

1, 6, 24, 84, 270, 780, 2268, 5832, 15876, 37848, 98058, 221400, 550644, 1194096, 2880324, 6042600, 14072928, 28685316, 65451120, 130464594, 288080334, 560852526, 1222435008, 2344246554, 4953629430, 9307132992, 19531257918

Offset

0,2

Links

Table of n, a(n) for n=0..26.

Crossrefs

Cf. A118035; A118040 (triangle), A118041 (column 0), A118042 (column 1); A118044 (row sums); related triangles: A118032, A118045.

Sequence in context: A047790 A133474 A052150 * A317408 A166060 A124807

Adjacent sequences: A118040 A118041 A118042 * A118044 A118045 A118046

Keyword

nonn

Author

Paul D. Hanna, Apr 10 2006

Status

approved