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A246698 Inverse of A246696 considered as a permutation of the positive integers. 2
1, 2, 3, 5, 4, 7, 6, 9, 8, 12, 10, 14, 11, 16, 13, 18, 15, 20, 17, 23, 19, 25, 21, 27, 22, 29, 24, 31, 26, 33, 28, 35, 30, 38, 32, 40, 34, 42, 36, 44, 37, 46, 39, 48, 41, 50, 43, 52, 45, 54, 47, 57, 49, 59, 51, 61, 53, 63, 55, 65, 56, 67, 58, 69, 60, 71, 62 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..67.

Index entries for sequences that are permutations of the natural numbers

MATHEMATICA

z = 25; t[0, 0] = 1; t[1, 0] = 2; t[1, 1] = 3; t[n_, 0] := t[n, 0] = If[OddQ[n], t[n - 1, n - 2] + 2, t[n - 1, n - 1] + 2]; t[n_, 1] := t[n, 1] = If[OddQ[n], t[n - 1, n - 1] + 2, t[n - 1, n - 2] + 2]

t[n_, k_] := t[n, k] = t[n, k - 2] + 2;

u = Flatten[Table[t[n, k], {n, 0, z}, {k, 0, n}]] (* A246696 *)

Flatten[Table[Position[u, n], {n, 1, 80}]]  (* A246698 *)

CROSSREFS

Cf. A246696, A246697.

Sequence in context: A227082 A227142 A246696 * A246681 A123883 A255558

Adjacent sequences:  A246695 A246696 A246697 * A246699 A246700 A246701

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Sep 02 2014

EXTENSIONS

Definition corrected and edited by M. F. Hasler, Nov 17 2014

STATUS

approved

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Last modified January 25 07:39 EST 2020. Contains 331241 sequences. (Running on oeis4.)