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A046337
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Odd numbers with an even number of prime factors (counted with multiplicity).
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35
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1, 9, 15, 21, 25, 33, 35, 39, 49, 51, 55, 57, 65, 69, 77, 81, 85, 87, 91, 93, 95, 111, 115, 119, 121, 123, 129, 133, 135, 141, 143, 145, 155, 159, 161, 169, 177, 183, 185, 187, 189, 201, 203, 205, 209, 213, 215, 217, 219, 221, 225, 235, 237, 247, 249, 253, 259
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OFFSET
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1,2
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LINKS
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FORMULA
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MATHEMATICA
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Select[Range[1, 301, 2], EvenQ[PrimeOmega[#]]&] (* Harvey P. Dale, Jul 25 2011 *)
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PROG
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(PARI) lista(nn) = {forstep(n=1, nn, 2, if (bigomega(n) % 2 == 0, print1(n, ", "))); } \\ Michel Marcus, Jul 04 2015
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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