Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 1 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 1 3 4 6 or 7.
A252208
Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 1 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 1 3 4 6 or 7.
Terms
- a(0) =125554a(1) =932474a(2) =22430534a(3) =84935426a(4) =2778728210a(5) =78534150994a(6) =267361717782
External references
- oeis: A252208