A036350 Composite numbers such that the sum of the prime factors is odd (counted with multiplicity).

6, 10, 12, 14, 20, 22, 24, 26, 27, 28, 34, 38, 40, 44, 45, 46, 48, 52, 54, 56, 58, 62, 63, 68, 74, 75, 76, 80, 82, 86, 88, 90, 92, 94, 96, 99, 104, 105, 106, 108, 112, 116, 117, 118, 122, 124, 125, 126, 134, 136, 142, 146, 147, 148, 150, 152, 153, 158, 160, 164

Offset: 1

Author

Patrick De Geest, Dec 15 1998

Keywords

• nonn
• base

Examples

			44 = 2 * 2 * 11 -> sum = 15 -> 15 is odd.
		

Crossrefs

Cf. A001414, A046363, A036349.

Subsequence of A335657.

Programs

Mathematica

okQ[n_]:=!PrimeQ[n]&&OddQ[Total[Flatten[Table[First[#],{Last[#]}]&/@ FactorInteger[n]]]]; Select[Range[2,200],okQ] (* Harvey P. Dale, Dec 18 2011 *)