A323521 - OEIS

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A323521

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

4

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

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..65.

MATHEMATICA

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

CROSSREFS

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

Sequence in context: A098216 A341321 A063806 * A063989 A168645 A282668

Adjacent sequences: A323518 A323519 A323520 * A323522 A323523 A323524

KEYWORD

nonn

AUTHOR

Gus Wiseman, Jan 17 2019

STATUS

approved