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A046470
Even numbers with an odd number of prime factors (counted with multiplicity).
6
2, 8, 12, 18, 20, 28, 30, 32, 42, 44, 48, 50, 52, 66, 68, 70, 72, 76, 78, 80, 92, 98, 102, 108, 110, 112, 114, 116, 120, 124, 128, 130, 138, 148, 154, 162, 164, 168, 170, 172, 174, 176, 180, 182, 186, 188, 190, 192, 200, 208, 212, 222, 230, 236, 238, 242, 244
OFFSET
1,1
EXAMPLE
a(2)=8, which is even with odd number of prime factors i.e. 3.
MATHEMATICA
Select[Range[2, 244, 2], OddQ[PrimeOmega[#]] &] (* Jayanta Basu, Jun 26 2013 *)
CROSSREFS
Cf. A046337.
Sequence in context: A290608 A340690 A303900 * A090772 A046525 A235353
KEYWORD
nonn
AUTHOR
Shyam Sunder Gupta, Feb 16 2002
STATUS
approved