A106412 Smallest number beginning with 2 that is the product of exactly n distinct primes.

2, 21, 222, 210, 2310, 201630, 2012010, 20030010, 223092870, 20090100030, 200560490130, 20055767721990, 2000029432190790, 20384767656323070, 2000848249650860610, 200001648981983238390, 2183473617971732996910

Offset

1,1

Links

Table of n, a(n) for n=1..17.

Example

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

Crossrefs

Cf. A077326-A077334, A106411-A106419, A106421-A106429.

Sequence in context: A137287 A155872 A323478 * A329497 A058476 A099748

Adjacent sequences: A106409 A106410 A106411 * A106413 A106414 A106415

Keyword

base,nonn

Author

Ray Chandler, May 02 2005

Status

approved