A106429 Smallest number beginning with 9 and having exactly n prime divisors counted with multiplicity.

97, 9, 92, 90, 918, 96, 972, 960, 9072, 9600, 90624, 9216, 93312, 90112, 903168, 98304, 995328, 917504, 9043968, 9175040, 90243072, 9437184, 95551488, 92274688, 924844032, 922746880, 9042919424, 905969664, 9172942848, 9059696640

Offset

1,1

Links

Table of n, a(n) for n=1..30.

Example

a(2) = 9 = 3^2.

Prog

(PARI) a(n) = {i = 2^n; while ((digits(i)[1] != 9) || (bigomega(i)!=n), i++); i; } \\ Michel Marcus, Sep 14 2013

Crossrefs

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

Sequence in context: A117846 A058286 A051330 * A126840 A247384 A345528

Adjacent sequences: A106426 A106427 A106428 * A106430 A106431 A106432

Keyword

base,nonn

Author

Ray Chandler, May 02 2005

Status

approved