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A133701 A133698 * A051731. 2
1, 1, 1, 2, 0, 2, 1, 1, 0, 1, 2, 0, 0, 0, 2, 2, 2, 2, 0, 0, 2, 2, 0, 0, 0, 0, 0, 2, 1, 1, 0, 1, 0, 0, 0, 1, 3, 0, 3, 0, 0, 0, 0, 0, 3, 2, 2, 0, 0, 2, 0, 0, 0, 0, 2 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Left and right borders = A001227: (1, 1, 2, 1, 2, 2, 2,...), the number of odd divisors of n. Row sums = A133702, the inverse Mobius transform of A023136.

LINKS

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

FORMULA

A133698 * A051731 as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle are:

1;

1, 1;

2, 0, 2;

1, 1, 0, 1;

2, 0, 0, 0, 2;

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

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

1, 1, 0, 1, 0, 0, 0, 1;

...

CROSSREFS

Cf. A051731, A133698, A001227, A133702, A023136.

Sequence in context: A039976 A287267 A317540 * A230417 A287263 A102442

Adjacent sequences:  A133698 A133699 A133700 * A133702 A133703 A133704

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Sep 21 2007

STATUS

approved

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Last modified June 17 05:45 EDT 2021. Contains 345080 sequences. (Running on oeis4.)