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A132476 A007318^(-1) * [3*A007318^2 - 2*A000012]. 1
1, 3, 1, 3, 8, 1, 3, 7, 13, 1, 3, 14, 12, 18, 1, 3, 13, 38, 18, 23, 1, 3, 20, 35, 80, 25, 28, 1, 3, 19, 75, 75, 145, 33, 33, 1, 3, 26, 70, 210, 140, 238, 42, 38, 1, 3, 25, 124, 196, 490, 238, 364, 52, 43, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Row sums = A132477: (1, 4, 12, 24, 48, 96, 192,...).

LINKS

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

FORMULA

Inverse binomial transform of [3*A007318 - 2*A000012], as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle are:

1;

3, 1;

3, 8, 1;

3, 7, 13, 1;

3, 14, 12, 18, 1;

3, 13, 38, 18, 23, 1;

3, 20, 35, 80, 25, 28, 1;

...

CROSSREFS

Cf. A007318, A000012, A132477.

Sequence in context: A133580 A019603 A171843 * A328807 A103279 A208910

Adjacent sequences:  A132473 A132474 A132475 * A132477 A132478 A132479

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Aug 22 2007

STATUS

approved

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Last modified July 29 10:40 EDT 2021. Contains 346344 sequences. (Running on oeis4.)