Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum not 0 1 2 7 8 or 9 and every diagonal and antidiagonal sum 0 1 2 7 8 or 9.
A251982
Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum not 0 1 2 7 8 or 9 and every diagonal and antidiagonal sum 0 1 2 7 8 or 9.
Terms
- a(0) =6881308a(1) =782954632a(2) =13277304274a(3) =98312125934
External references
- oeis: A251982