A323521 Numbers whose number of prime factors counted with multiplicity (A001222) is not a perfect square.

4, 6, 8, 9, 10, 12, 14, 15, 18, 20, 21, 22, 25, 26, 27, 28, 30, 32, 33, 34, 35, 38, 39, 42, 44, 45, 46, 48, 49, 50, 51, 52, 55, 57, 58, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 82, 85, 86, 87, 91, 92, 93, 94, 95, 96, 98, 99, 102, 105, 106

Offset: 1

Author

Gus Wiseman, Jan 17 2019

Keywords

• nonn

Crossrefs

Cf. A000037, A001222, A000290, A026478, A063989, A323519, A323520, A323527.

Programs

Mathematica

Select[Range[100],!IntegerQ[Sqrt[PrimeOmega[#]]]&]