Number of (n+2)X(2+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 4.
A252393
Number of (n+2)X(2+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 4.
Terms
- a(0) =21544a(1) =437023a(2) =9807871a(3) =203636149a(4) =4246242886a(5) =89843675557
External references
- oeis: A252393