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A133699 A051731 * A133698. 1
1, 1, 1, 1, 0, 2, 1, 1, 0, 1, 1, 0, 0, 0, 2, 1, 1, 2, 0, 0, 2, 1, 0, 0, 0, 0, 0, 2, 1, 1, 0, 1, 0, 0, 0, 1, 1, 0, 2, 0, 0, 0, 0, 0, 3, 1, 1, 0, 0, 2, 0, 0, 0, 0, 2 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,6

COMMENTS

Right border = A001227, the number of odd divisors of n. Row sums = A133700: (1, 2, 3, 3, 3, 6, 3, 4, 6, 6,...)

LINKS

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

FORMULA

Inverse Mobius transform of A133698, as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle are:

1;

1, 1;

1, 0, 2;

1, 1, 0, 1;

1, 0, 0, 0, 2;

1, 1, 2, 0, 0, 2;

1, 0, 0, 0, 0, 0, 2;

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

...

CROSSREFS

Cf. A051731, A133698, A133700.

Sequence in context: A171400 A271592 A128409 * A157361 A224444 A101808

Adjacent sequences:  A133696 A133697 A133698 * A133700 A133701 A133702

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Sep 21 2007

STATUS

approved

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Last modified August 5 20:40 EDT 2021. Contains 346488 sequences. (Running on oeis4.)