Central terms of triangle A127082; a(n) = A127082(2*n,n).
A127090
Central terms of triangle A127082; a(n) = A127082(2*n,n).
Terms
- a(0) =1a(1) =2a(2) =15a(3) =192a(4) =3635a(5) =92730a(6) =2998366a(7) =117857600a(8) =5465922021a(9) =292505725990
External references
- oeis: A127090