Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 2 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 2 3 4 6 or 7.
A252159
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 2 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 2 3 4 6 or 7.
Terms
- a(0) =2581a(1) =1930a(2) =2264a(3) =9058a(4) =90638a(5) =1007913a(6) =13087197a(7) =433466577a(8) =10924924975a(9) =323391798040
External references
- oeis: A252159