Number of (6+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 3 4 6 or 7.
A252549
Number of (6+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 3 4 6 or 7.
Terms
- a(0) =33852a(1) =881848a(2) =15204660a(3) =84935088a(4) =2316305760a(5) =38252054800a(6) =267361717440
External references
- oeis: A252549