Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 2 5 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 2 5 6 or 7.
A252415
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 2 5 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 2 5 6 or 7.
Terms
- a(0) =830a(1) =854a(2) =2348a(3) =6834a(4) =96549a(5) =1757580a(6) =7509929a(7) =405192038a(8) =25078925104a(9) =125775052127
External references
- oeis: A252415