A372166 Inverse permutation to A371985.

1, 2, 3, 4, 5, 6, 9, 8, 7, 10, 17, 11, 33, 18, 13, 16, 65, 14, 129, 12, 19, 34, 257, 20, 21, 66, 15, 25, 513, 22, 1025, 32, 35, 130, 37, 23, 2049, 258, 67, 24, 4097, 38, 8193, 36, 29, 514, 16385, 27, 41, 26, 131, 68, 32769, 30, 49, 40, 259, 1026, 65537, 28

Offset

1,2

Links

Table of n, a(n) for n=1..60.

Rémy Sigrist, PARI program

Index entries for sequences that are permutations of the natural numbers

Formula

a(prime(k)) = 2^(k-1) + 1 for any k > 0 (where prime(k) denotes the k-th prime number).

Example

A371985(42) = 70, so a(70) = 42.

Prog

(PARI) \\ See Links section.

Crossrefs

Cf. A355405, A371985.

Sequence in context: A005940 A332815 A355405 * A005941 A355460 A355809

Adjacent sequences: A372163 A372164 A372165 * A372167 A372168 A372169

Keyword

nonn

Author

Rémy Sigrist, Apr 21 2024

Status

approved