Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 4 6 or 7.
A252104
Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 4 6 or 7.
Terms
- a(0) =70372a(1) =120128a(2) =727203a(3) =3681127a(4) =31734323a(5) =204205735a(6) =1113772174a(7) =10036222063a(8) =65817065181a(9) =375634409542
External references
- oeis: A252104