A091622 Column 1 of triangle A091615.

1, 2, 6, 11, 26, 61, 132, 290, 638, 1390, 3012, 6496, 13940, 29793, 63450, 134628, 284764, 600596, 1263304, 2650684, 5549117, 11592553, 24170837, 50306424, 104527509, 216852455, 449232326, 929378744, 1920295902, 3963077103

Offset: 1

Author

Christian G. Bower, Jan 23 2004

Keywords

• nonn