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A100367
Even numbers with two prime factors, not counting multiplicity.
14
6, 10, 12, 14, 18, 20, 22, 24, 26, 28, 34, 36, 38, 40, 44, 46, 48, 50, 52, 54, 56, 58, 62, 68, 72, 74, 76, 80, 82, 86, 88, 92, 94, 96, 98, 100, 104, 106, 108, 112, 116, 118, 122, 124, 134, 136, 142, 144, 146, 148, 152, 158, 160, 162, 164, 166, 172, 176, 178, 184, 188
OFFSET
1,1
COMMENTS
This is a proper subset of A098902. E.g., 210 is not here, but it is there.
Numbers of the form 2^k*p^h where k > 0, h > 0, and p is an odd prime. [corrected by Lei Zhou, Oct 29 2018]
LINKS
MATHEMATICA
Select[Range[2, 200, 2], PrimeNu@ # == 2 &] (* Michael De Vlieger, Oct 31 2018 *)
PROG
(PARI) isok(n) = !(n%2) && (omega(n) == 2); \\ Michel Marcus, Feb 02 2018
CROSSREFS
Cf. A001221.
Intersection of A007774 and A098902.
The even terms of A336101.
A100368 is a subsequence.
Sequence in context: A176587 A174164 A098902 * A213716 A337486 A373676
KEYWORD
nonn
AUTHOR
Labos Elemer, Nov 22 2004
STATUS
approved