Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 5 6 or 7.
A252677
Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 5 6 or 7.
Terms
- a(0) =2564a(1) =6645a(2) =24666a(3) =78851a(4) =362380a(5) =1404868a(6) =4829707a(7) =22804431a(8) =89973961a(9) =315275226a(10) =1511485105a(11) =6030881043a(12) =21308895365a(13) =103029313279a(14) =413747872090
External references
- oeis: A252677