Number of n X n 0..2 symmetric arrays with every row summing to n.
A213794
Number of n X n 0..2 symmetric arrays with every row summing to n.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =13a(4) =169a(5) =5673a(6) =526443a(7) =133721189a(8) =95133854529
External references
- oeis: A213794