Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 2 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 2 4 6 or 7.
A252522
Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 2 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 2 4 6 or 7.
Terms
- a(0) =2176a(1) =9069a(2) =39689a(3) =96659a(4) =581529a(5) =2662952a(6) =6486931a(7) =38674076a(8) =177771524a(9) =432970668a(10) =2576695286a(11) =11849993914a(12) =28861601874a(13) =171722924036a(14) =789791249282
External references
- oeis: A252522