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A133702 A051731 * A023136. 2
1, 2, 4, 3, 4, 8, 4, 4, 9, 8, 4, 12, 4, 8, 16, 5, 6, 18, 4, 12, 16, 8, 4, 16, 9, 8, 16, 12, 4, 32, 8, 6, 16, 12, 16, 27, 4, 8, 16, 16, 6, 32, 8, 12, 36, 8, 4, 20, 9, 18, 24, 12, 4, 32, 16, 16, 16, 8, 4, 48, 4, 16, 44, 7, 20, 32, 4, 18, 16, 32, 4, 36, 10, 8, 36, 12, 16, 32, 4, 20, 25, 12, 4, 48 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A023136 = (1, 1, 3, 1, 3, 3, 3, 1, 5, 3,...)

LINKS

Table of n, a(n) for n=1..84.

FORMULA

Inverse Mobius transform of A023136.

EXAMPLE

a(4) = 3 = (1, 1, 0, 1) * (1, 1, 3, 1) = (1, 1, 0, 1), row 4 of triangle A133701.

CROSSREFS

Cf. A051731, A133698, A023136.

Sequence in context: A050514 A229047 A335841 * A328486 A332224 A080001

Adjacent sequences:  A133699 A133700 A133701 * A133703 A133704 A133705

KEYWORD

nonn

AUTHOR

Gary W. Adamson, Sep 21 2007

EXTENSIONS

More terms from R. J. Mathar, Jan 19 2009

STATUS

approved

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Last modified June 16 14:16 EDT 2021. Contains 345057 sequences. (Running on oeis4.)