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A077327 Smallest number beginning with 2 and having exactly n distinct prime divisors. 8
2, 20, 204, 210, 2310, 200970, 2012010, 20030010, 223092870, 20090100030, 200560490130, 20055767721990, 2000029432190790, 20384767656323070, 2000848249650860610, 200001648981983238390, 2183473617971732996910 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

EXAMPLE

a(1) = 2, a(5) = 2310 = 2*3*5*7*11.

CROSSREFS

Cf. A077326, A077328, A077329, A077330, A077331, A077332, A077333, A077334.

Cf. A106411-A106419, A106421-A106429.

Sequence in context: A109107 A037729 A037624 * A173499 A067636 A000906

Adjacent sequences:  A077324 A077325 A077326 * A077328 A077329 A077330

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 04 2002

EXTENSIONS

Correct a(2) and a(3), add a(6)-a(11) from Ray Chandler (rayjchandler(AT)sbcglobal.net), Apr 17 2005

More terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), May 02 2005

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Last modified February 16 21:51 EST 2012. Contains 205978 sequences.