A047059 T(2n,n), array T given by A047050.

1, 2, 9, 48, 275, 1652, 10150, 63282, 398746, 2533674, 16205319, 104195452, 672838453, 4360534510, 28346553454, 184759124740, 1206997624839, 7900952176826, 51811230435895, 340294870303512, 2238219252373710

Offset

0,2

Links

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

Crossrefs

Sequence in context: A190315 A190253 A174687 * A153297 A364734 A153390

Adjacent sequences: A047056 A047057 A047058 * A047060 A047061 A047062

Keyword

nonn

Author

Clark Kimberling

Status

approved