A266118 a(n) = index of n in A266117 or 0 if n is not present in that sequence.

1, 2, 3, 4, 5, 8, 9, 11, 12, 6, 7, 10, 14, 18, 23, 22, 19, 15, 16, 26, 21, 20, 27, 13, 31, 17, 37, 30, 28, 25, 59, 24, 39, 33, 70, 40, 41, 48, 47, 38, 35, 29, 74, 44, 64, 54, 53, 32, 45, 56, 49, 50, 34, 36, 51, 61, 62, 55, 52, 57, 42, 58, 66, 63, 43, 60, 75, 69, 68, 76, 77, 46, 73, 67, 85, 83, 94, 78, 71, 65, 89, 98, 136, 79, 119, 100

Offset

1,2

Comments

It is conjectured that A266117 is not just injective, but also surjective on N, i.e., that it is a true permutation of natural numbers. In that case also this sequence is a true permutation, and no hypothetical zero-values are ever needed.

Links

Antti Karttunen, Table of n, a(n) for n = 1..12634

Index entries for sequences that are permutations of the natural numbers

Prog

(Scheme, with code for A266117 defined with defineperm1-macro also required)
(define (A266118 n) (A266117 (- n))) ;; This returns inverse values of A266117 from its hidden cache.

Crossrefs

Inverse: A266117 (with provisions, see comment section).

Sequence in context: A337801 A116214 A161389 * A287802 A371284 A214207

Adjacent sequences: A266115 A266116 A266117 * A266119 A266120 A266121

Keyword

nonn,base

Author

Antti Karttunen, Dec 22 2015

Status

approved