Number of (n+2) X (6+2) 0..2 arrays with every 3 X 3 subblock row and column sum 2 3 or 4 and every diagonal and antidiagonal sum not 2 3 or 4.
A252226
Number of (n+2) X (6+2) 0..2 arrays with every 3 X 3 subblock row and column sum 2 3 or 4 and every diagonal and antidiagonal sum not 2 3 or 4.
Terms
- a(0) =4738a(1) =70284a(2) =231254a(3) =512822a(4) =1339010a(5) =4329476a(6) =13842872a(7) =42480650a(8) =129860460a(9) =399765942a(10) =1232739446a(11) =3797303378a(12) =11691726372a(13) =36003050792a(14) =110877928074a(15) =341465317292
External references
- oeis: A252226