A026093 T(2n,n+1), where T is the array defined in A026082.

1, 3, 27, 156, 925, 5427, 31812, 186485, 1094211, 6428346, 37817163, 222778629, 1314116799, 7761414055, 45894511305, 271681161390, 1609919112321, 9549113626206, 56690129330346, 336829717243428

Offset

1,2

Links

Table of n, a(n) for n=1..20.

Crossrefs

Sequence in context: A127509 A108142 A056263 * A215711 A270956 A129530

Adjacent sequences: A026090 A026091 A026092 * A026094 A026095 A026096

Keyword

nonn

Author

Clark Kimberling

Status

approved