A211317 a(n) = A211316(2n+1).

0, 1, 2, 2, 3, 4, 4, 6, 6, 6, 7, 8, 10, 9, 10, 10, 12, 14, 12, 13, 14, 14, 18, 16, 16, 18, 18, 22, 19, 20, 20, 21, 26, 22, 24, 24, 24, 30, 28, 26, 27, 28, 34, 30, 30, 30, 31, 38, 32, 36, 34, 34, 42, 36, 36, 37, 38, 46, 39, 42, 44, 42, 50, 42, 43, 44, 44, 54, 46, 46, 48, 52, 58, 49, 50

Offset: 0

Author

N. J. A. Sloane, Apr 24 2012

Keywords

• nonn
• more

Comments

Considering only the odd-indexed terms of A211316 is motivated by the fact that A211316(2n) = n, so the idea is to skip these "uninteresting" terms. - M. F. Hasler, Jun 30 2025

Crossrefs

Cf. A211316.

Programs

PARI

apply( A211317(n)=A211316(2*n+1), [0..88]) \\ M. F. Hasler, Jun 30 2025

Extensions

Extended to a(0) = 0 and more terms from M. F. Hasler, Jun 30 2025