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A134199 A002260 + A134082 - I as infinite lower triangular matrices; I = Identity matrix. 1
1, 3, 2, 1, 6, 3, 1, 2, 9, 4, 1, 2, 3, 12, 5, 1, 2, 3, 4, 15, 6, 1, 2, 3, 4, 5, 18, 7, 1, 2, 3, 4, 5, 6, 21, 8, 1, 2, 3, 4, 5, 6, 7, 24, 9, 1, 2, 3, 4, 5, 6, 7, 8, 27, 10 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Row sums = A052905: (1, 5, 10, 16, 23, 31, 40,...).

LINKS

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

EXAMPLE

First few rows of the triangle are:

1;

3, 2;

1, 6, 3;

1, 2, 9, 4;

1, 2, 3, 12, 5;

1, 2, 3, 4, 15, 6;

1, 2, 3, 4, 5, 18, 7;

...

CROSSREFS

Cf. A002260, A134082, A052905.

Sequence in context: A002130 A089145 A324644 * A323417 A102189 A031252

Adjacent sequences:  A134196 A134197 A134198 * A134200 A134201 A134202

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Oct 13 2007

STATUS

approved

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Last modified January 17 04:46 EST 2022. Contains 350378 sequences. (Running on oeis4.)