Number of n X n 0..4 symmetric arrays with every row summing to 2*n.
A213796
Number of n X n 0..4 symmetric arrays with every row summing to 2*n.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =57a(4) =3249a(5) =815263a(6) =932587453
External references
- oeis: A213796