A167175 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A167175

Numbers with a nonprime number of prime divisors (counted with multiplicity).

5

1, 2, 3, 5, 7, 11, 13, 16, 17, 19, 23, 24, 29, 31, 36, 37, 40, 41, 43, 47, 53, 54, 56, 59, 60, 61, 64, 67, 71, 73, 79, 81, 83, 84, 88, 89, 90, 96, 97, 100, 101, 103, 104, 107, 109, 113, 126, 127, 131, 132, 135, 136, 137, 139, 140, 144, 149, 150, 151, 152, 156, 157, 160

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..1000

MATHEMATICA

Select[Range[200], !PrimeQ[PrimeOmega[#]]&] (* Harvey P. Dale, Apr 14 2013 *)

PROG

(PARI) is(n)=!isprime(bigomega(n)) \\ Charles R Greathouse IV, Jun 19 2016

CROSSREFS

Cf. A001222, A063989, A141468.

Sequence in context: A117093 A062063 A211338 * A026478 A211485 A154893

Adjacent sequences: A167172 A167173 A167174 * A167176 A167177 A167178

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov, Oct 29 2009

EXTENSIONS

86 replaced by 96, 112 and 124 removed, 147 replaced by 144, 153 removed - R. J. Mathar, Apr 14 2010

STATUS

approved