A026887 T(2n+1,n+1), T given by A026769.

1, 3, 11, 44, 186, 819, 3725, 17402, 83156, 405116, 2006696, 10083578, 51303146, 263851841, 1369807435, 7170160392, 37803475750, 200584271466, 1070306614530, 5739790997296, 30919312935436, 167228980869678, 907759276349466

Offset

0,2

Links

Table of n, a(n) for n=0..22.

Maple

A026887 := proc(n)
    A026769(2*n+1, n+1) ;
end proc: # R. J. Mathar, Jun 15 2014

Crossrefs

Sequence in context: A001207 A319156 A394136 * A389410 A151106 A302186

Adjacent sequences: A026884 A026885 A026886 * A026888 A026889 A026890

Keyword

nonn

Author

Clark Kimberling

Status

approved