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A106409
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n XOR (greatest proper divisor of n).
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9
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0, 3, 2, 6, 4, 5, 6, 12, 10, 15, 10, 10, 12, 9, 10, 24, 16, 27, 18, 30, 18, 29, 22, 20, 28, 23, 18, 18, 28, 17, 30, 48, 42, 51, 36, 54, 36, 53, 42, 60, 40, 63, 42, 58, 34, 57, 46, 40, 54, 43, 34, 46, 52, 45, 60, 36, 42, 39, 58, 34, 60, 33, 42, 96, 76, 99, 66, 102, 82, 101, 70
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OFFSET
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1,2
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COMMENTS
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LINKS
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MAPLE
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a:= n-> Bits[Xor](n, max(1, (numtheory[divisors](n) minus {n})[])):
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MATHEMATICA
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PROG
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(PARI) gpd(n) = if(n==1, 1, n/factor(n)[1, 1]); \\ A032742
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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