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A162966
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Union of 1 and nonsquarefree numbers (A013929).
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1
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1, 4, 8, 9, 12, 16, 18, 20, 24, 25, 27, 28, 32, 36, 40, 44, 45, 48, 49, 50, 52, 54, 56, 60, 63, 64, 68, 72, 75, 76, 80, 81, 84, 88, 90, 92, 96, 98, 99, 100, 104, 108, 112, 116, 117, 120, 121, 124, 125, 126, 128, 132, 135, 136, 140, 144, 147, 148, 150, 152, 153, 156, 160
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OFFSET
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1,2
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COMMENTS
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Or, the natural numbers that are not products of distinct primes. Also, number of prime divisors of n < number of nonprime divisors of n. - Juri-Stepan Gerasimov, Nov 10 2009
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LINKS
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MATHEMATICA
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t = {1}; Do[If[Max[Transpose[FactorInteger[n]][[2]]] > 1, AppendTo[t, n]], {n, 2, 160}]; t (* Jayanta Basu, Apr 30 2013 *)
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PROG
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CROSSREFS
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KEYWORD
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nonn,less
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AUTHOR
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STATUS
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approved
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