Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 4 6 or 7.
A252456
Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 4 6 or 7.
Terms
- a(0) =9013a(1) =56643a(2) =464384a(3) =3675259a(4) =29527662a(5) =240708592a(6) =1956458824a(7) =15909752456a(8) =129736526156
External references
- oeis: A252456