Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 5 6 or 8.
A252470
Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 5 6 or 8.
Terms
- a(0) =4507a(1) =3497a(2) =18175a(3) =96543a(4) =504030a(5) =2670237a(6) =14105131a(7) =74389293a(8) =393421203a(9) =2079994072a(10) =10983498859a(11) =58012068897a(12) =306545373256
External references
- oeis: A252470