Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 2 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 2 3 4 6 or 7.
A252399
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 2 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 2 3 4 6 or 7.
Terms
- a(0) =458a(1) =442a(2) =1515a(3) =6231a(4) =73925a(5) =1068295a(6) =8765249a(7) =335814585a(8) =13694498100a(9) =187357176355
External references
- oeis: A252399