Number of totally isotropic spaces of index n in orthogonal geometry of dimension 2n.

A028361

Number of totally isotropic spaces of index n in orthogonal geometry of dimension 2n.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =30a(4) =270a(5) =4590a(6) =151470a(7) =9845550a(8) =1270075950a(9) =326409519150

External references