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A130277 A130209 * A051731. 0
1, 2, 2, 2, 0, 2, 3, 3, 0, 3, 2, 0, 0, 0, 2, 4, 4, 4, 0, 0, 4, 2, 0, 0, 0, 0, 0, 2, 4, 4, 0, 4, 0, 0, 0, 4, 3, 0, 3, 0, 0, 0, 0, 0, 3, 4, 4, 0, 0, 4, 0, 0, 0, 0, 4, 4 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row sums = A035116: (1, 4, 4, 9, 4, 16, 4, 16,...). Right and left borders = A000005, d(n): (1, 2, 2, 3, 2, 4, 2,...).

LINKS

Table of n, a(n) for n=1..56.

FORMULA

A130209 * A051731 as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle are:

1;

2, 2;

2, 0, 2;

3, 3, 0, 3;

2, 0, 0, 0, 2;

4, 4, 4, 0, 0, 4;

2, 0, 0, 0, 0, 0, 2;

4, 4, 0, 4, 0, 0, 0, 4;

...

CROSSREFS

Cf. A130209, A051731, A000005, A035116.

Sequence in context: A118205 A216265 A336694 * A109135 A264136 A274850

Adjacent sequences:  A130274 A130275 A130276 * A130278 A130279 A130280

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, May 18 2007

STATUS

approved

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Last modified August 9 02:14 EDT 2020. Contains 336310 sequences. (Running on oeis4.)