Number of n X n symmetric 0..6 arrays with no element equal to the sum mod 7 of any two of its horizontal and vertical neighbors.
A193224
Number of n X n symmetric 0..6 arrays with no element equal to the sum mod 7 of any two of its horizontal and vertical neighbors.
Terms
- a(0) =7a(1) =216a(2) =19002a(3) =5354628a(4) =4811755110
External references
- oeis: A193224