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A122978 Number of sublattices of the division lattice of divisors of n. 5
1, 3, 3, 7, 3, 12, 3, 15, 7, 12, 3, 37, 3, 12, 12, 31, 3, 37, 3, 37, 12, 12, 3, 103, 7, 12, 15, 37, 3, 73, 3, 63, 12, 12, 12, 146, 3, 12, 12, 103, 3, 73, 3, 37, 37, 12, 3, 271, 7, 37, 12, 37, 3, 103, 12, 103, 12, 12, 3, 319, 3, 12, 37, 127, 12, 73, 3, 37, 12, 73, 3, 505, 3, 12, 37, 37 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A division lattice is closed under GCD and LCM. Depends only on the prime signature of n.

LINKS

Table of n, a(n) for n=1..76.

CROSSREFS

Cf. A051839, A122977, A122981, A122982.

Sequence in context: A069949 A143275 A083262 * A119347 A323774 A062402

Adjacent sequences:  A122975 A122976 A122977 * A122979 A122980 A122981

KEYWORD

nonn

AUTHOR

Franklin T. Adams-Watters, Sep 21 2006

STATUS

approved

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Last modified May 5 19:23 EDT 2021. Contains 343573 sequences. (Running on oeis4.)