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A134397 A077018 * A007318. 1
1, 2, 1, 4, 4, 1, 8, 12, 6, 1, 15, 30, 23, 8, 1, 26, 65, 68, 37, 10, 1, 42, 126, 168, 126, 54, 12, 1, 64, 224, 364, 350, 208, 74, 14, 1, 93, 372, 714, 840, 642, 318, 97, 16, 1, 130, 585, 1296, 1806, 1692, 1080, 460, 123, 18, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Row sums = A048481: (1, 3, 9, 27, 77, 207, 529,...).

LINKS

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

FORMULA

A077018 * A007318 as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle are:

1;

2, 1;

4, 4, 1;

8, 12, 6, 1;

15, 30, 23, 8, 1;

26, 65, 68, 37, 10, 1;

42, 126, 168, 126, 54, 12, 1;

...

CROSSREFS

Cf. A077018, A048481.

Sequence in context: A140693 A131249 A048807 * A134395 A038207 A065109

Adjacent sequences:  A134394 A134395 A134396 * A134398 A134399 A134400

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Oct 23 2007

STATUS

approved

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Last modified January 17 14:12 EST 2019. Contains 319225 sequences. (Running on oeis4.)