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A097699 Records in the numbers of antichains in the divisor lattice D(n) (A096827). +0
2
2, 3, 4, 6, 10, 15, 20, 21, 50, 105, 175, 196, 490, 887, 1176, 3490 (list; graph; listen)
OFFSET

1,1

COMMENT

The divisor lattice D(n) is the lattice of the divisors of the natural number n. This sequence counts the empty set as an antichain.

CROSSREFS

Cf. A096827.

Sequence in context: A121152 A089223 A094861 this_sequence A086990 A090412 A073028

Adjacent sequences: A097696 A097697 A097698 this_sequence A097700 A097701 A097702

KEYWORD

nonn

AUTHOR

John W. Layman (layman(AT)math.vt.edu), Aug 20 2004

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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