A026291 a(n) = T(2n-1,n), where T is the array in A026268.

2, 14, 79, 446, 2530, 14442, 82913, 478384, 2771900, 16119808, 94038087, 550083340, 3225409094, 18951732050, 111562247565, 657813211278, 3884461464740, 22968812720476, 135978792939818

Offset

2,1

Links

Table of n, a(n) for n=2..20.

Crossrefs

Cf. A026268.

Sequence in context: A183577 A121200 A112408 * A220867 A216985 A361813

Adjacent sequences: A026288 A026289 A026290 * A026292 A026293 A026294

Keyword

nonn

Author

Clark Kimberling

Status

approved