A077332 Smallest number beginning with 7 and having exactly n distinct prime divisors.

7, 72, 70, 714, 7140, 71610, 746130, 70136220, 703600590, 70015935990, 700288518930, 7420738134810, 701098433345310, 70007243563797540, 757887406446280110, 70025936403159126390, 7001749954335151685670, 700007496840185797172910

Offset

1,1

Links

Table of n, a(n) for n=1..18.

Example

a(3) = 70 = 2*5*7.

Crossrefs

Cf. A077326, A077327, A077328, A077329, A077330, A077331, A077333, A077334.

Cf. A106411-A106419, A106421-A106429.

Sequence in context: A063861 A093632 A242827 * A222833 A005413 A306377

Adjacent sequences: A077329 A077330 A077331 * A077333 A077334 A077335

Keyword

base,nonn

Author

Amarnath Murthy, Nov 04 2002

Extensions

a(5)-a(10) from Ray Chandler, Apr 17 2005

More terms from Ray Chandler, May 02 2005

Status

approved