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A340679
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If n is a power of prime then a(n) = 1, otherwise a(n) = product of the distinct prime factors of n.
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1
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1, 1, 1, 1, 1, 6, 1, 1, 1, 10, 1, 6, 1, 14, 15, 1, 1, 6, 1, 10, 21, 22, 1, 6, 1, 26, 1, 14, 1, 30, 1, 1, 33, 34, 35, 6, 1, 38, 39, 10, 1, 42, 1, 22, 15, 46, 1, 6, 1, 10, 51, 26, 1, 6, 55, 14, 57, 58, 1, 30, 1, 62, 21, 1, 65, 66, 1, 34, 69, 70, 1, 6, 1, 74, 15, 38, 77, 78, 1, 10, 1, 82, 1, 42, 85, 86, 87, 22, 1, 30, 91, 46
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OFFSET
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1,6
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LINKS
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FORMULA
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If A010055(n) == 1 [when n is a power of prime], a(n) = 1, otherwise a(n) = A007947(n).
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MATHEMATICA
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Table[If[PrimePowerQ[n], 1, Times@@FactorInteger[n][[All, 1]]], {n, 100}] (* Harvey P. Dale, May 23 2021 *)
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PROG
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(PARI) A340679(n) = if(isprimepower(n), 1, factorback(factorint(n)[, 1]));
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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