Number of n X n symmetric 0..5 arrays with no element equal to the sum mod 6 of any two of its horizontal and vertical neighbors.
A193223
Number of n X n symmetric 0..5 arrays with no element equal to the sum mod 6 of any two of its horizontal and vertical neighbors.
Terms
- a(0) =6a(1) =123a(2) =5571a(3) =643473a(4) =194123061a(5) =159836740359
External references
- oeis: A193223