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A131032 A097806 * A130296. 2
1, 3, 1, 5, 2, 1, 7, 2, 2, 1, 9, 2, 2, 2, 1, 11, 2, 2, 2, 2, 1, 13, 2, 2, 2, 2, 2, 1, 15, 2, 2, 2, 2, 2, 2, 1, 17, 2, 2, 2, 2, 2, 2, 2, 1, 19, 2, 2, 2, 2, 2, 2, 2, 2, 1, 21, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 23, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row sums give A008574.

A131033 = A130296 * A097806.

LINKS

Table of n, a(n) for n=1..78.

FORMULA

A097806 * A130296 as infinite lower triangular matrices. A097806 = the pairwise operator, A130296 = (1; 2,1; 3,1,1; ...).

EXAMPLE

First few rows of the triangle are:

1;

3, 1;

5, 2, 1;

7, 2, 2, 1;

9, 2, 2, 2, 1;

11, 2, 2, 2, 2, 1;

13, 2, 2, 2, 2, 2, 1;

...

CROSSREFS

Cf. A008574, A097806, A130296, A131033.

Sequence in context: A111426 A100576 A212332 * A130323 A130303 A100898

Adjacent sequences: A131029 A131030 A131031 * A131033 A131034 A131035

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Jun 10 2007

EXTENSIONS

Definition corrected and more terms from Georg Fischer, Oct 10 2021

STATUS

approved

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Last modified January 29 13:38 EST 2023. Contains 359923 sequences. (Running on oeis4.)