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 A065257 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. 5
 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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS See comment at A065256. LINKS MAPLE [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; CROSSREFS Inverse permutation: A065258. A065257[n] = A004515[n-1]+1. Cf. also A065186, A065188. Sequence in context: A109313 A176881 A065188 * A258428 A090396 A086387 Adjacent sequences:  A065254 A065255 A065256 * A065258 A065259 A065260 KEYWORD nonn,base AUTHOR Antti Karttunen, Oct 26 2001 STATUS approved

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Last modified February 21 10:49 EST 2019. Contains 320372 sequences. (Running on oeis4.)