a(n) is the number of edges (one-dimensional faces) in the convex polytope of real n X n doubly stochastic matrices.

A059760

a(n) is the number of edges (one-dimensional faces) in the convex polytope of real n X n doubly stochastic matrices.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =15a(4) =240a(5) =5040a(6) =147240a(7) =5959800a(8) =323850240a(9) =22800476160

External references