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A305635
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1 and odd numbers that are not perfect powers.
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5
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1, 3, 5, 7, 11, 13, 15, 17, 19, 21, 23, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77, 79, 83, 85, 87, 89, 91, 93, 95, 97, 99, 101, 103, 105, 107, 109, 111, 113, 115, 117, 119, 123, 127, 129, 131, 133, 135, 137
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OFFSET
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1,2
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LINKS
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Table of n, a(n) for n=1..62.
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MATHEMATICA
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radQ[n_]:=Or[n==1, GCD@@FactorInteger[n][[All, 2]]==1];
Select[Range[200], OddQ[#]&&radQ[#]&]
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PROG
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(PARI) isok(n) = (n==1) || ((n % 2) && !ispower(n)); \\ Michel Marcus, Jun 08 2018
(Magma) [1] cat [n : n in [3..200 by 2] | not IsPower(n) ]; // Vincenzo Librandi, Jul 06 2018
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CROSSREFS
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Cf. A001597, A005117, A007916, A039956, A056911.
Cf. A305630, A305631, A305632, A305633, A305634.
Sequence in context: A348748 A182318 A247424 * A334420 A342144 A357014
Adjacent sequences: A305632 A305633 A305634 * A305636 A305637 A305638
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KEYWORD
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nonn
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AUTHOR
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Gus Wiseman, Jun 07 2018
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STATUS
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approved
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