Number of (n+2) X (n+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 2 4 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 2 4 6 or 7.
A252425
Number of (n+2) X (n+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 2 4 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 2 4 6 or 7.
Terms
- a(0) =641a(1) =688a(2) =1810a(3) =7575a(4) =85563a(5) =1190037a(6) =10924203a(7) =384953455a(8) =14875741975a(9) =235391624751
External references
- oeis: A252425