A026332 a(n) = T(2n,n), where T is the array in A026323.

1, 2, 10, 50, 266, 1452, 8073, 45460, 258434, 1479986, 8525205, 49342636, 286721450, 1671668520, 9774222930, 57291319170, 336537958394, 1980643375180, 11676498649312, 68940592625476, 407593403738856, 2412749904577020

Offset

0,2

Links

Table of n, a(n) for n=0..21.

Crossrefs

Sequence in context: A020699 A020729 A110170 * A027908 A206637 A318494

Adjacent sequences: A026329 A026330 A026331 * A026333 A026334 A026335

Keyword

nonn

Author

Clark Kimberling

Status

approved