A026872 T(2n,n+1), T given by A026758.

1, 4, 16, 65, 268, 1120, 4738, 20265, 87542, 381600, 1677170, 7427098, 33118073, 148618605, 670849720, 3044548675, 13886260129, 63627798355, 292789942333, 1352614829275, 6271530026012, 29176789293146, 136163014291526, 637294991967740

Offset

1,2

Links

Table of n, a(n) for n=1..24.

Crossrefs

Sequence in context: A165201 A026674 A099781 * A081915 A307878 A217632

Adjacent sequences: A026869 A026870 A026871 * A026873 A026874 A026875

Keyword

nonn

Author

Clark Kimberling

Status

approved