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A136787 Triangle read by rows: A107131 * A000012. 2
1, 1, 1, 2, 2, 1, 4, 4, 4, 1, 9, 9, 9, 7, 1, 21, 21, 21, 21, 11, 1, 51, 51, 51, 51, 46, 16, 1, 127, 127, 127, 127, 127, 92, 22, 1, 323, 323, 323, 323, 323, 309, 169, 29, 1, 835, 835, 835, 835, 835, 835, 709, 289, 37, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Row sums = A005773 starting (1, 2, 5, 13, 35, 96, 267,...). Leftmost column = A001006: (1, 1, 2, 4, 9, 21, 51,...). A136788 = A000012 * A107131.

LINKS

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

FORMULA

A107131 * A000012 as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle are:

1;

1, 1;

2, 2, 1;

4, 4, 4, 1;

9, 9, 9, 7, 1;

21, 21, 21, 21, 11, 1;

51, 51, 51, 51, 46, 16, 1;

127, 127, 127, 127, 127, 92, 22, 1;

...

CROSSREFS

Cf. A005773, A001006, A136788.

Sequence in context: A061436 A214095 A213948 * A165038 A305191 A261357

Adjacent sequences:  A136784 A136785 A136786 * A136788 A136789 A136790

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Jan 21 2008

STATUS

approved

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Last modified December 10 18:10 EST 2019. Contains 329901 sequences. (Running on oeis4.)