Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 2 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 2 5 6 or 7.
A252506
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 2 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 2 5 6 or 7.
Terms
- a(0) =1262a(1) =1644a(2) =11476a(3) =68163a(4) =505129a(5) =5381168a(6) =59046724a(7) =864964151a(8) =15499377193a(9) =419125606602
External references
- oeis: A252506