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

Author

Clark Kimberling

Keywords

• nonn

Programs

Maple

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