A077326 Smallest number beginning with 1 and having exactly n distinct prime divisors.

1, 11, 10, 102, 1020, 10010, 101010, 1009470, 11741730, 1001110110, 10407767370, 1000287585570, 10293281928930, 1001230315195110, 13082761331670030, 1004819888620217670, 100015003602410826930, 1922760350154212639070

Offset

0,2

Comments

What are the values of n where a(n) differ from A106411(n)? So far only n=4 is such a value. - Chai Wah Wu, May 07 2025

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: A362335 A105026 A350671 * A106411 A353728 A304747

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