A122978 Number of sublattices of the division lattice of divisors of n.

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

Offset: 1

Author

Franklin T. Adams-Watters, Sep 21 2006

Keywords

• nonn

Comments

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

Crossrefs

Cf. A051839, A122977, A122981, A122982.