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A131398

1, 1, 1, 2, 4, 1, 2, 8, 7, 1, 2, 11, 17, 10, 1, 2, 14, 29, 29, 13, 1, 2, 17, 44, 59, 44, 16, 1, 2, 20, 62, 104, 104, 62, 19, 1, 2, 23, 83, 167, 209, 167, 83, 22, 1, 2, 26, 107, 251, 377, 377, 251, 107, 25, 1

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OFFSET

0,4

COMMENTS

Row sums = A077802, (1, 2, 7, 18, 41, 88,...).

LINKS

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

FORMULA

3*A007318 - A097806 - A000012 as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle are:

1, 1;

2, 4, 1;

2, 8, 7, 1;

2, 11, 17, 10, 1;

2, 14, 29, 29, 13, 1;

...

CROSSREFS

Cf. A007318, A097806, A000012, A077802.

Sequence in context: A331696 A364837 A333651 * A249307 A209581 A342053

Adjacent sequences: A131395 A131396 A131397 * A131399 A131400 A131401

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Jul 05 2007

STATUS

approved

URL: https://oeis.org/A131398

⇱ A131398 - OEIS