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A077326 Smallest number beginning with 1 and having exactly n distinct prime divisors. 26
1, 11, 10, 102, 1020, 10010, 101010, 1009470, 11741730, 1001110110, 10407767370, 1000287585570, 10293281928930, 1001230315195110, 13082761331670030, 1004819888620217670, 100015003602410826930, 1922760350154212639070 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..17.

EXAMPLE

a(0) = 1, a(5) = 10010 = 2*5*7*11*13.

CROSSREFS

Cf. A077327, A077328, A077329, A077330, A077331, A077332, A077333, A077334.

Cf. A106411-A106419, A106421-A106429.

Sequence in context: A275782 A120005 A105026 * A106411 A304747 A304749

Adjacent sequences:  A077323 A077324 A077325 * A077327 A077328 A077329

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Nov 04 2002

EXTENSIONS

More terms from Sascha Kurz, Jan 04 2003

a(9)-a(10) from Ray Chandler, Apr 17 2005

More terms from Ray Chandler, May 02 2005

STATUS

approved

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Last modified November 13 21:28 EST 2019. Contains 329106 sequences. (Running on oeis4.)