A077329 Smallest number beginning with 4 and having exactly n distinct prime divisors.

4, 40, 42, 420, 4290, 43890, 4001970, 40029990, 406816410, 40026056070, 401120980260, 40013061952710, 405332750552730, 40111962162442170, 4000228915204892370, 40909794684132183810, 4000669166940700163910

Offset

1,1

Links

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

Example

a(1) = 4, a(3) = 42.

Crossrefs

Cf. A077326, A077327, A077328, A077330, A077331, A077332, A077333, A077334.

Cf. A106411-A106419, A106421-A106429.

Sequence in context: A274686 A217397 A104292 * A169967 A061473 A367926

Adjacent sequences: A077326 A077327 A077328 * A077330 A077331 A077332

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