Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 5 6 or 7.
A252211
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 5 6 or 7.
Terms
- a(0) =874a(1) =1078a(2) =3303a(3) =44776a(4) =984604a(5) =34351865a(6) =1834743852a(7) =150852965441
External references
- oeis: A252211