Number of n X n symmetric 0..2 arrays with each element equal to the sum mod 3 of two of its horizontal and vertical neighbors.
A193119
Number of n X n symmetric 0..2 arrays with each element equal to the sum mod 3 of two of its horizontal and vertical neighbors.
Terms
- a(0) =0a(1) =3a(2) =15a(3) =423a(4) =36303a(5) =7680999a(6) =4383590853
External references
- oeis: A193119