id:A094098 - OEIS Search Results

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Number of divisor chains of length n in which the first term is a divisor of n(n+1)/2 ("cyclic" divisor chains).

+0
3

1, 0, 2, 0, 2, 0, 3, 0, 5, 0, 6, 0, 6, 0, 147, 1, 22, 2, 27, 165, 519, 0, 516, 2021, 1912, 506, 45658, 514, 7308, 1535, 30746, 68918, 145920, 1370 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`A divisor chain of length n is an arrangement of 1..n such that each term is a divisor of the sum of the preceding terms.`
	CROSSREFS	`Cf. A067957, A094097, A094099.` `Sequence in context: A005868 A035455 A029191 this_sequence A124137 A025804 A042961` `Adjacent sequences: A094095 A094096 A094097 this_sequence A094099 A094100 A094101`
	KEYWORD	`nonn`
	AUTHOR	`Chris Landauer (cal(AT)aero.org), May 04, 2004.`
	EXTENSIONS	`a(29)-a(34) from John W. Layman (layman(AT)math.vt.edu), May 07 2004`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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