A163814 Write down the squarefree positive integers, with a(1) = 1, and each m-th prime replaced with the m-th composite squarefree positive integer, and each m-th composite squarefree positive integer replaced with the m-th prime.

1, 6, 10, 14, 2, 15, 3, 21, 22, 5, 7, 26, 30, 11, 13, 33, 17, 34, 19, 35, 23, 29, 31, 38, 37, 41, 39, 43, 42, 47, 46, 53, 51, 59, 61, 67, 55, 57, 71, 73, 79, 58, 83, 89, 62, 65, 97, 101, 103, 66, 107, 69, 109, 113, 127, 70, 131, 137, 139, 149, 74, 77, 151, 78

Offset

1,2

Comments

This is a permutation of the squarefree positive integers.

Links

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

Rémy Sigrist, PARI program for A163814

Prog

(PARI) See Links section.

Crossrefs

Cf. A005117, A163813.

Sequence in context: A135596 A233456 A189762 * A088706 A087710 A163504

Adjacent sequences: A163811 A163812 A163813 * A163815 A163816 A163817

Keyword

nonn

Author

Leroy Quet, Aug 04 2009

Extensions

More terms from Rémy Sigrist, Feb 06 2019

Status

approved