A128260 - OEIS

A128260

A128229 * A051731.

1, 2, 1, 3, 2, 1, 4, 1, 3, 1, 5, 4, 0, 4, 1, 6, 1, 1, 0, 5, 1, 7, 6, 6, 0, 0, 6, 1, 8, 1, 0, 1, 0, 0, 7, 1, 9, 8, 1, 8, 0, 0, 0, 8, 1, 10, 1, 9, 0, 1, 0, 0, 0, 9, 1

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OFFSET

1,2

COMMENTS

Row sums = A128261: (1, 3, 6, 9, 14, 14, 26, 18, 35, 31, ...).

LINKS

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

EXAMPLE

First few rows of the triangle:

2, 1;

3, 2, 1;

4, 1, 3, 1;

5, 4, 0, 4, 1;

6, 1, 1, 0, 5, 1;

7, 6, 6, 0, 0, 6, 1;

8, 1, 0, 1, 0, 0, 7, 1;

...

CROSSREFS

Cf. A128229, A051731, A128261, A128259.

Sequence in context: A138530 A002341 A348888 * A083368 A112379 A361101

Adjacent sequences: A128257 A128258 A128259 * A128261 A128262 A128263

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Feb 21 2007

STATUS

approved