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A176847
The odd non-semiprime numbers.
1
1, 3, 5, 7, 11, 13, 17, 19, 23, 27, 29, 31, 37, 41, 43, 45, 47, 53, 59, 61, 63, 67, 71, 73, 75, 79, 81, 83, 89, 97, 99, 101, 103, 105, 107, 109, 113, 117, 125, 127, 131, 135, 137, 139, 147, 149, 151, 153, 157, 163, 165, 167, 171, 173, 175, 179, 181, 189, 191, 193, 195
OFFSET
1,2
LINKS
MATHEMATICA
Select[Range[1000], ! PrimeOmega[#] == 2 && OddQ[#] &] (* G. C. Greubel, Sep 22 2018 *)
PROG
(PARI) s=[]; for(n=1, 1000, if(n%2==1 && bigomega(n)!=2, s=concat(s, n))); s \\ Colin Barker, Jun 28 2014
(PARI) concat( vector( 200, n, if( n%2 && bigomega(n)!=2, [n], []))) /* Michael Somos, Jun 28 2014 */
CROSSREFS
Cf. A100959.
Sequence in context: A109860 A100392 A309203 * A067019 A132106 A242393
KEYWORD
nonn
AUTHOR
Juri-Stepan Gerasimov, Apr 27 2010, May 01 2010
EXTENSIONS
Corrected (115 removed) by R. J. Mathar, May 01 2010
STATUS
approved