id:A023996 - OEIS Search Results

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Triangle of numbers T(n,k), where T(n,k) is the number of sets S = {a_1, a_2, ..., a_k}, with 1 < a_i < a_j <= n such that no a_j divides the product of all the others.

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1, 1, 1, 1, 2, 1, 1, 3, 2, 1, 4, 5, 2, 1, 5, 7, 3, 1, 6, 12, 10, 3, 1, 7, 16, 15, 5, 1, 8, 22, 24, 9, 1, 9, 28, 34, 14, 1, 10, 37, 62, 48, 14, 1, 11, 43, 74, 58, 17, 1, 12, 54, 117, 132, 75, 17, 1, 13, 64, 151, 182, 108, 25, 1, 14, 75, 184, 224, 132, 30, 1, 15, 86 (list; table; graph; listen)

	OFFSET	`0,5`
	CROSSREFS	`Cf. A023995.` `Sequence in context: A124832 A137569 A089177 this_sequence A049998 A029253 A016441` `Adjacent sequences: A023993 A023994 A023995 this_sequence A023997 A023998 A023999`
	KEYWORD	`tabl,nonn`
	AUTHOR	`Lionel Levine (levine(AT)ultranet.com)`

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Last modified March 20 09:10 EDT 2010. Contains 173642 sequences.

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