A355405 Inverse permutation to A269838.

1, 2, 3, 4, 5, 6, 9, 8, 7, 10, 17, 11, 33, 18, 13, 12, 65, 14, 129, 20, 19, 34, 257, 16, 21, 66, 15, 25, 513, 22, 1025, 24, 35, 130, 37, 23, 2049, 258, 67, 26, 4097, 38, 8193, 36, 29, 514, 16385, 27, 41, 42, 131, 68, 32769, 30, 49, 40, 259, 1026

Offset

1,2

Links

Rémy Sigrist, Table of n, a(n) for n = 1..10000

Rémy Sigrist, PARI program

Index entries for sequences that are permutations of the natural numbers

Formula

a(prime(n)) = 2^(n-1) + 1 (where prime(n) denotes the n-th prime number).

Example

A269838(38) = 42, so a(42) = 38.

Prog

(PARI) See Links section.

Crossrefs

Cf. A269838.

Sequence in context: A357268 A005940 A332815 * A372166 A005941 A355460

Adjacent sequences: A355402 A355403 A355404 * A355406 A355407 A355408

Keyword

nonn

Author

Rémy Sigrist, Jul 01 2022

Status

approved