A099136 Inverse integer permutation to A099135.

1, 12, 2, 8, 9, 3, 13, 4, 14, 5, 10, 7, 6, 11, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72

Offset

1,2

Comments

a(n) <> n iff 1 < n <= 14.

Links

Table of n, a(n) for n=1..72.

Index entries for sequences that are permutations of the natural numbers

Index entries for linear recurrences with constant coefficients, signature (2,-1).

Mathematica

LinearRecurrence[{2, -1}, {1, 12, 2, 8, 9, 3, 13, 4, 14, 5, 10, 7, 6, 11, 15, 16}, 80] (* Harvey P. Dale, Mar 03 2023 *)

Prog

(PARI) a(n)=if(n>14, n, [1, 12, 2, 8, 9, 3, 13, 4, 14, 5, 10, 7, 6, 11][n]) \\ Charles R Greathouse IV, Sep 02 2011

Crossrefs

Sequence in context: A036383 A107832 A322521 * A215416 A264970 A287205

Adjacent sequences: A099133 A099134 A099135 * A099137 A099138 A099139

Keyword

nonn,easy

Author

Reinhard Zumkeller, Sep 29 2004

Status

approved