A345444 a(n) = A344005(2*n+1).

1, 2, 4, 6, 8, 10, 12, 5, 16, 18, 6, 22, 24, 26, 28, 30, 11, 14, 36, 12, 40, 42, 9, 46, 48, 17, 52, 10, 18, 58, 60, 27, 25, 66, 23, 70, 72, 24, 21, 78, 80, 82, 34, 29, 88, 13, 30, 19, 96, 44, 100, 102, 14, 106, 108, 36, 112, 45, 26, 34, 120, 41, 124, 126, 42, 130, 56, 54, 136, 138, 47, 65, 29

Offset: 0

Author

N. J. A. Sloane, Jul 06 2021

Keywords

• nonn

Comments

The companion bisection to A011772.

Crossrefs

Cf. A011772, A344005.

Formula

a(n) = 2*n if 2*n+1 is a prime power. - Chai Wah Wu, Jul 06 2021