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A072978 Numbers of the form m*2^Omega(m), where m>1 is odd and Omega(m)=A001222(m), the number of prime factors of m. 18
1, 6, 10, 14, 22, 26, 34, 36, 38, 46, 58, 60, 62, 74, 82, 84, 86, 94, 100, 106, 118, 122, 132, 134, 140, 142, 146, 156, 158, 166, 178, 194, 196, 202, 204, 206, 214, 216, 218, 220, 226, 228, 254, 260, 262, 274, 276, 278, 298, 302, 308, 314, 326, 334, 340, 346 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
(number of odd prime factors)=(number of even prime factors).
A007814(a(n)) = A087436(a(n)); A000400, A011557, A001023, A001024, A009965, A009966 and A009975 are subsequences. - Reinhard Zumkeller, Jan 06 2008
Subsequence of A028260. [From Reinhard Zumkeller, Sep 20 2008]
LINKS
MATHEMATICA
Sort[Table[m*2^PrimeOmega[m], {m, 1, 250, 2}]] (* Harvey P. Dale, Oct 18 2013 *)
CROSSREFS
Sequence in context: A315234 A315235 A080784 * A055163 A342192 A119431
KEYWORD
nonn,nice
AUTHOR
Reinhard Zumkeller, Aug 20 2002
STATUS
approved

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Last modified June 3 10:54 EDT 2023. Contains 363110 sequences. (Running on oeis4.)