Number of n X n symmetric 0..7 arrays with no element equal to the sum or difference mod 8 of any two of its horizontal and vertical neighbors.
A193786
Number of n X n symmetric 0..7 arrays with no element equal to the sum or difference mod 8 of any two of its horizontal and vertical neighbors.
Terms
- a(0) =8a(1) =225a(2) =12385a(3) =2332419a(4) =1850486123
External references
- oeis: A193786