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A130585

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

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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:

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

URL: https://oeis.org/A130585

⇱ A130585 - OEIS