Number of n X n 0..3 symmetric arrays with every row summing to floor(n*3/2).
A213795
Number of n X n 0..3 symmetric arrays with every row summing to floor(n*3/2).
Terms
- a(0) =1a(1) =1a(2) =4a(3) =29a(4) =880a(5) =87932a(6) =34725760a(7) =46259653191
External references
- oeis: A213795