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A238964 Size of divisor lattice in canonical order. 0
0, 1, 2, 4, 3, 7, 12, 4, 10, 12, 20, 32, 5, 13, 17, 28, 33, 52, 80, 6, 16, 22, 36, 24, 46, 72, 54, 84, 128, 192, 7, 19, 27, 44, 31, 59, 92, 64, 75, 116, 176, 135, 204, 304, 448, 8, 22, 32, 52, 38 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..50.

S.-H. Cha, E. G. DuCasse, and L. V. Quintas, Graph Invariants Based on the Divides Relation and Ordered by Prime Signatures, arxiv:1405.5283

CROSSREFS

Cf. A238953 in canonical order.

Sequence in context: A257504 A207625 A238953 * A035507 A138612 A246680

Adjacent sequences:  A238961 A238962 A238963 * A238965 A238966 A238967

KEYWORD

nonn

AUTHOR

Sung-Hyuk Cha, Mar 07 2014

STATUS

approved

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Last modified March 18 16:20 EDT 2019. Contains 321292 sequences. (Running on oeis4.)