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A065257
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Quintal Queens permutation of N: double (mod 5) each digit (0->0, 1->2, 2->4, 3->1, 4->3) of the base-5 representation of n-1, add one.
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5
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1, 3, 5, 2, 4, 11, 13, 15, 12, 14, 21, 23, 25, 22, 24, 6, 8, 10, 7, 9, 16, 18, 20, 17, 19, 51, 53, 55, 52, 54, 61, 63, 65, 62, 64, 71, 73, 75, 72, 74, 56, 58, 60, 57, 59, 66, 68, 70, 67, 69, 101, 103, 105, 102, 104, 111, 113, 115, 112, 114, 121, 123, 125, 122, 124, 106
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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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[seq(QuintalQueens1(j), j=1..125)]; QuintalQueens0 := n -> DoubleDigits(n, 5); QuintalQueens1 := n -> 1+QuintalQueens0(n-1);
DoubleDigits := proc(n, b) local i; add((b^i)*((2*floor(n/(b^i))) mod b), i=0..floor(evalf(log[b](n+1)))+1); end;
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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