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A127371 Triangle, row sums = n, left column = d(n). 0
1, 2, 0, 2, 1, 0, 3, 0, 1, 0, 2, 1, 1, 1, 0, 4, 1, 0, 0, 1, 0, 2, 1, 1, 1, 1, 1, 0, 4, 0, 2, 0, 1, 0, 1, 0, 3, 2, 0, 1, 1, 0, 1, 1, 0, 4, 1, 2, 1, 0, 0, 1, 0, 1, 0, 1, 0 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row sums = n, left column = d(n), (A000005: 1, 2, 2, 3, 2, 4, 2,...)

LINKS

Table of n, a(n) for n=1..57.

FORMULA

A051731 * A054521, as infinite lower triangular matrices. Inverse Mobius transform of A054521.

EXAMPLE

First few rows of the triangle are:

1;

2, 0;

2, 1, 0;

3, 0, 1, 0;

2, 1, 1, 1, 0;

4, 1, 0, 0, 1, 0;

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

4, 0, 2, 0, 1, 0, 1, 0;

3, 2, 0, 1, 1, 0, 1, 1, 0;

...

CROSSREFS

Cf. A051731, A000005, A054521.

Sequence in context: A190436 A133696 A195050 * A036849 A097364 A254204

Adjacent sequences:  A127368 A127369 A127370 * A127372 A127373 A127374

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Jan 12 2007

STATUS

approved

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Last modified May 31 00:53 EDT 2020. Contains 334747 sequences. (Running on oeis4.)