Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 3 4 6 or 7.
A252361
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 3 4 6 or 7.
Terms
- a(0) =130a(1) =276a(2) =3054a(3) =45516a(4) =1007920a(5) =35124242a(6) =1875961304a(7) =154187447172
External references
- oeis: A252361