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A106543
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Composite numbers that are not perfect powers.
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10
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6, 10, 12, 14, 15, 18, 20, 21, 22, 24, 26, 28, 30, 33, 34, 35, 38, 39, 40, 42, 44, 45, 46, 48, 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 82, 84, 85, 86, 87, 88, 90, 91, 92, 93, 94, 95, 96, 98, 99, 102, 104, 105, 106
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OFFSET
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1,1
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LINKS
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FORMULA
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MATHEMATICA
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perfPQ[n_]:=GCD@@FactorInteger[n][[All, 2]]>1; Select[Range[110], CompositeQ[ #] && !perfPQ[#]&] (* Harvey P. Dale, Oct 10 2017 *)
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PROG
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(PARI) lista(nn)=forcomposite(i=1, nn, if (! ispower(i), print1(i, ", ")); ); \\ Michel Marcus, Jun 27 2013
(CASE)
def A106543_list(n) : return [k for k in (2..n) if not k.is_prime() and not k.is_perfect_power()]
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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