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A106412 Smallest number beginning with 2 that is the product of exactly n distinct primes. 1
2, 21, 222, 210, 2310, 201630, 2012010, 20030010, 223092870, 20090100030, 200560490130, 20055767721990, 2000029432190790, 20384767656323070, 2000848249650860610, 200001648981983238390, 2183473617971732996910 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
a(1) = 2, a(5) = 2310 = 2*3*5*7*11.
CROSSREFS
Sequence in context: A137287 A155872 A323478 * A329497 A058476 A099748
KEYWORD
base,nonn
AUTHOR
Ray Chandler, May 02 2005
STATUS
approved

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Last modified May 15 22:47 EDT 2024. Contains 372549 sequences. (Running on oeis4.)