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A133996 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. 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; refs; listen; history; internal format)
OFFSET

2,1

LINKS

Ray Chandler, Table of n, a(n) for n=2..85

CROSSREFS

Cf. A133997, A132747.

Sequence in context: A179674 A038199 A056267 * A080742 A005417 A058215

Adjacent sequences:  A133993 A133994 A133995 * A133997 A133998 A133999

KEYWORD

nonn

AUTHOR

Leroy Quet Oct 01 2007

EXTENSIONS

Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Jun 24 2008

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Last modified February 17 23:58 EST 2012. Contains 206085 sequences.