Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 2 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 2 5 6 or 7.
A252513
Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 2 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 2 5 6 or 7.
Terms
- a(0) =17709a(1) =231372a(2) =767176a(3) =1808374a(4) =5219625a(5) =17585706a(6) =59046724a(7) =209788816a(8) =715958046a(9) =2479308557a(10) =9956085785a(11) =36534703306a(12) =134720021233a(13) =603603095063
External references
- oeis: A252513