A088861 Third column of triangle in A088643.

1, 2, 3, 2, 5, 6, 5, 8, 9, 8, 9, 10, 9, 14, 15, 16, 13, 14, 17, 20, 21, 20, 21, 22, 21, 22, 23, 24, 29, 30, 31, 28, 29, 32, 35, 36, 37, 34, 35, 38, 39, 40, 39, 40, 41, 42, 41, 42, 47, 50, 51, 50, 53, 54, 53, 54, 55, 56, 57, 58, 59, 50, 51, 62, 63, 64, 63, 68, 69, 70, 71, 72, 65

Offset: 1

Author

N. J. A. Sloane, Nov 26 2003

Keywords

• nonn
• easy

Crossrefs

Cf. A088643. A088631 gives second column.

Extensions

More terms from John W. Layman, Dec 04 2003