A026089 a(n) = T(2n,n), where T is the array defined in A026082.

1, 2, 4, 16, 93, 518, 2932, 16709, 95849, 552749, 3201848, 18616751, 108592239, 635175153, 3724193120, 21881993115, 128810517855, 759515272026, 4485048436792, 26520334731436, 157006248094198

Offset

0,2

Links

Table of n, a(n) for n=0..20.

Crossrefs

Bisection of A026094.

Sequence in context: A007171 A058136 A156335 * A052835 A009565 A009838

Adjacent sequences: A026086 A026087 A026088 * A026090 A026091 A026092

Keyword

nonn

Author

Clark Kimberling

Status

approved