A168485 A165342(3n)/3.

0, 1, 1, 3, 4, 5, 3, 7, 2, 9, 5, 11, 6, 13, 7, 15, 4, 17, 9, 19, 80, 21, 11, 23, 6, 25, 13, 27, 14, 29, 15, 31, 8, 33, 17, 35, 36, 37, 19, 39, 10, 41, 21, 43, 22, 45, 23, 47, 12, 49, 25, 51, 104, 53, 27, 55, 14, 57, 29, 59

Offset: 0

Author

Paul Curtz, Nov 27 2009

Keywords

• nonn

Formula

a(n) = A166720(n)/3.

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