A097699 - OEIS

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A097699

Records in the numbers of antichains in the divisor lattice D(n) (A096827).

2, 3, 4, 6, 10, 15, 20, 21, 50, 105, 175, 196, 490, 887, 1176, 3490 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`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: A089223 A094861 A173473 * A086990 A090412 A073028` `Adjacent sequences: A097696 A097697 A097698 * A097700 A097701 A097702`
	KEYWORD	`nonn`
	AUTHOR	`John W. Layman (layman(AT)math.vt.edu), Aug 20 2004`

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Last modified February 15 09:35 EST 2012. Contains 205753 sequences.