%I #4 Jan 17 2019 17:17:58

%S 4,6,8,9,10,12,14,15,18,20,21,22,25,26,27,28,30,32,33,34,35,38,39,42,

%T 44,45,46,48,49,50,51,52,55,57,58,62,63,64,65,66,68,69,70,72,74,75,76,

%U 77,78,80,82,85,86,87,91,92,93,94,95,96,98,99,102,105,106

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

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

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

%K nonn

%O 1,1

%A _Gus Wiseman_, Jan 17 2019