Number of vertices of the Gelfand Tsetlin-polytope. Alternatively, the number of Gelfand-Tsetlin patterns with top row 1234...n and such that every entry in a given row also appears in the row above it.
A130715
Number of vertices of the Gelfand Tsetlin-polytope. Alternatively, the number of Gelfand-Tsetlin patterns with top row 1234...n and such that every entry in a given row also appears in the row above it.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =40a(4) =358a(5) =4884a(6) =99665a(7) =3000736a(8) =131932016a(9) =8403206128
External references
- oeis: A130715