Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 1 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 1 3 4 6 or 7.
A252241
Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 1 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 1 3 4 6 or 7.
Terms
- a(0) =34364a(1) =932024a(2) =22430004a(3) =84935088a(4) =2778727776a(5) =78534150416a(6) =267361717440
External references
- oeis: A252241