Number of n X n symmetric 0..5 arrays with no element equal to the sum or difference mod 6 of any two of its horizontal and vertical neighbors.
A193784
Number of n X n symmetric 0..5 arrays with no element equal to the sum or difference mod 6 of any two of its horizontal and vertical neighbors.
Terms
- a(0) =6a(1) =75a(2) =1383a(3) =82057a(4) =17485499a(5) =12269256241
External references
- oeis: A193784