A130585 A054522 * A007318.

1, 2, 1, 3, 4, 2, 4, 7, 6, 2, 5, 16, 24, 16, 4, 6, 15, 22, 20, 10, 2, 7, 36, 90, 120, 90, 36, 6, 8, 35, 90, 142, 140, 84, 28, 4, 9, 52, 170, 336, 420, 336, 168, 48, 6, 10, 53, 168, 352, 508, 504, 336, 144, 36, 4

Offset

0,2

Comments

A130584 = A007318 * A054522 Row sums = A130586: (1, 3, 9, 19, 65, 75, 385, ...).

Links

Table of n, a(n) for n=0..54.

Formula

A054522 * A007318 as infinite lower triangular matrices.

Example

First few rows of the triangle:
  1;
  2,  1;
  3,  4,  2;
  4,  7,  6,   2;
  5, 16, 24,  16,  4;
  6, 15, 22,  20, 10,  2;
  7, 36, 90, 120, 90, 36, 6;
  ...

Crossrefs

Cf. A054522, A007318, A130585, A130586.

Sequence in context: A362311 A131389 A131394 * A209151 A125100 A128544

Adjacent sequences: A130582 A130583 A130584 * A130586 A130587 A130588

Keyword

nonn,tabl

Author

Gary W. Adamson, Jun 06 2007

Status

approved