Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 3 or 4.
A252080
Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 3 or 4.
Terms
- a(0) =64a(1) =322a(2) =3326a(3) =47266a(4) =1034546a(5) =35987921a(6) =1915241208a(7) =157183478333
External references
- oeis: A252080