A355436 Inverse permutation to A355435.

1, 2, 4, 3, 8, 5, 16, 6, 13, 7, 32, 12, 64, 15, 9, 11, 128, 20, 256, 10, 17, 31, 512, 14, 25, 63, 29, 18, 1024, 24, 2048, 22, 33, 127, 49, 21, 4096, 255, 61, 23, 8192, 28, 16384, 30, 52, 511, 32768, 19, 113, 26, 125, 62, 65536, 36, 57, 27, 253, 1023, 131072

Offset: 1

Author

Rémy Sigrist, Jul 02 2022

Keywords

• nonn

Examples

			A355435(28) = 42, so a(42) = 28.
		

Links

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

Crossrefs

Cf. A355435.

Programs

PARI

See Links section.

Formula

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