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A238953 The size of divisor lattice D(n) in graded (reflected or not) colexicographic order of exponents. 1
0, 1, 2, 4, 3, 7, 12, 4, 10, 12, 20, 32, 5, 13, 17, 28, 33, 52, 80, 6, 16, 22, 24, 36, 46, 54, 72, 84, 128, 192, 7, 19, 27, 31, 44, 59, 64, 75, 92, 116, 135, 176, 204, 304, 448, 8, 22, 32, 38, 40, 52, 72, 82, 96, 104, 112, 148, 160, 186, 216, 224, 280, 324, 416 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..64.

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. A062799 in graded colexicographic order.

Sequence in context: A166017 A257504 A207625 * A238964 A035507 A138612

Adjacent sequences:  A238950 A238951 A238952 * A238954 A238955 A238956

KEYWORD

nonn

AUTHOR

Sung-Hyuk Cha, Mar 07 2014

STATUS

approved

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Last modified March 25 03:50 EDT 2019. Contains 321450 sequences. (Running on oeis4.)