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A128134 A128132 * A007318. 3
1, 1, 2, 2, 5, 3, 3, 10, 11, 4, 4, 17, 27, 19, 5, 5, 26, 54, 56, 29, 6, 6, 37, 95, 130, 100, 41, 7, 7, 50, 153, 260, 265, 162, 55, 8, 8, 65, 231, 469, 595, 483, 245, 71, 9, 9, 82, 332, 784, 1190, 1204, 812, 352, 89, 10 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

A007318 * A128132 = A128133. Row sums = A128135: (1, 3, 10, 28, 72, 176,...)

LINKS

Table of n, a(n) for n=1..55.

FORMULA

A128132 * A007318 as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle are:

1;

1, 2;

2, 5, 3;

3, 10, 11, 4;

4, 17, 27, 19, 5;

5, 26, 54, 56, 29, 6;

6, 37, 95, 130, 100, 41, 7;

...

CROSSREFS

Cf. A128132, A128133, A128135, A007318.

Sequence in context: A157495 A308143 A308515 * A157223 A174608 A130327

Adjacent sequences:  A128131 A128132 A128133 * A128135 A128136 A128137

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Feb 15 2007

STATUS

approved

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Last modified July 4 15:25 EDT 2020. Contains 335448 sequences. (Running on oeis4.)