Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 5 6 or 7.
A252215
Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 5 6 or 7.
Terms
- a(0) =3147a(1) =2836a(2) =10486a(3) =44776a(4) =188866a(5) =801122a(6) =3410786a(7) =14539238a(8) =61939226a(9) =263654432a(10) =1122558798a(11) =4780929468a(12) =20360099382a(13) =86698049968a(14) =369189620578
External references
- oeis: A252215