Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum 1 3 6 or 8 and every diagonal and antidiagonal sum not 1 3 6 or 8.
A252007
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum 1 3 6 or 8 and every diagonal and antidiagonal sum not 1 3 6 or 8.
Terms
- a(0) =756a(1) =1602a(2) =1434a(3) =3814a(4) =23074a(5) =159514a(6) =630978a(7) =9398338a(8) =147443266a(9) =727410882a(10) =26971790466
External references
- oeis: A252007