id:A133996 - OEIS Search Results

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a(n) = the smallest positive integer with exactly n positive "non-isolated divisors". A divisor, k, of n is non-isolated if (k-1) or (k+1) also divides n.

+0
3

2, 6, 12, 30, 60, 90, 180, 360, 630, 420, 840, 1680, 4200, 1260, 2520, 3780, 7560, 15120, 13860, 36960, 49140, 27720, 32760, 65520, 83160, 98280, 196560, 314160, 277200, 491400, 526680, 471240, 360360, 1164240, 942480, 720720, 1081080 (list; graph; listen)

	OFFSET	`2,1`
	LINKS	`Ray Chandler, Table of n, a(n) for n=2..85`
	CROSSREFS	`Cf. A133997, A132747.` `Sequence in context: A024701 A038199 A056267 this_sequence A080742 A005417 A058215` `Adjacent sequences: A133993 A133994 A133995 this_sequence A133997 A133998 A133999`
	KEYWORD	`nonn`
	AUTHOR	`Leroy Quet (q1qq2qqq3qqqq(AT)yahoo.com), Oct 01 2007`
	EXTENSIONS	`Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Jun 24 2008`

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Last modified December 4 21:35 EST 2008. Contains 151309 sequences.

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