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

1,2

Links

Table of n, a(n) for n=1..30.

Crossrefs

Sequence in context: A191307 A007186 A033304 * A362051 A191315 A184884

Adjacent sequences: A091619 A091620 A091621 * A091623 A091624 A091625

Keyword

nonn

Author

Christian G. Bower, Jan 23 2004

Status

approved