Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 5 6 or 8 and every 3X3 diagonal and antidiagonal sum equal to 0 3 5 6 or 8.
A252351
Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 5 6 or 8 and every 3X3 diagonal and antidiagonal sum equal to 0 3 5 6 or 8.
Terms
- a(0) =12670a(1) =66229a(2) =294801a(3) =1312020a(4) =9477253a(5) =49182987a(6) =249626459a(7) =1786788265a(8) =9363179389a(9) =48251359131a(10) =344793840705
External references
- oeis: A252351