id:A133997 - OEIS Search Results

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a(n) = the smallest positive integer with exactly n positive "isolated divisors". A divisor, k, of n is isolated if neither (k-1) nor (k+1) divides n.

+0
3

1, 3, 9, 15, 36, 45, 126, 96, 144, 120, 324, 240, 336, 432, 360, 480, 672, 864, 720, 840, 1260, 1008, 1080, 1920, 1440, 2040, 1680, 2016, 2160, 3024, 2880, 2520, 4620, 4200, 3360, 5544, 4320, 6048, 6300, 9072, 7200, 11700, 5040, 12096, 7920, 7560, 10800 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`Ray Chandler, Table of n, a(n) for n=1..577`
	CROSSREFS	`Cf. A133996, A132881.` `Sequence in context: A031159 A058039 A013581 this_sequence A057909 A082702 A065917` `Adjacent sequences: A133994 A133995 A133996 this_sequence A133998 A133999 A134000`
	KEYWORD	`nonn`
	AUTHOR	`Leroy Quet (qq-quet(AT)mindspring.com), Oct 01 2007`
	EXTENSIONS	`Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Jun 24 2008`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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