Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 2 3 4 6 or 7.
A252261
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 2 3 4 6 or 7.
Terms
- a(0) =103a(1) =272a(2) =3016a(3) =44612a(4) =984416a(5) =34351677a(6) =1834743688a(7) =150852965253
External references
- oeis: A252261