A026859 T(2n,n-4), T given by A026747.

1, 15, 141, 1070, 7187, 44673, 263431, 1496218, 8266100, 44718596, 238015318, 1250656153, 6504202391, 33543967700, 171810543570, 875006817465, 4435130657170, 22390449598704, 112654298838120, 565172299571352

Offset

4,2

Links

Table of n, a(n) for n=4..23.

Crossrefs

Sequence in context: A215765 A055903 A320818 * A096046 A093117 A045724

Adjacent sequences: A026856 A026857 A026858 * A026860 A026861 A026862

Keyword

nonn

Author

Clark Kimberling

Status

approved