Number of n X n symmetric 0..2 arrays with no element equal to the product mod 3 of any two of its horizontal and vertical neighbors.
A193499
Number of n X n symmetric 0..2 arrays with no element equal to the product mod 3 of any two of its horizontal and vertical neighbors.
Terms
- a(0) =3a(1) =11a(2) =62a(3) =508a(4) =6113a(5) =111924a(6) =3135173a(7) =135866492a(8) =9010404513a(9) =922993092986
External references
- oeis: A193499