Number of nX4 0..1 arrays with no 1 equal to more than three of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements.
A284071
Number of nX4 0..1 arrays with no 1 equal to more than three of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements.
Terms
- a(0) =0a(1) =6a(2) =275a(3) =7302a(4) =151310a(5) =2816826a(6) =48994058a(7) =812565760a(8) =13024726520a(9) =203381556682
External references
- oeis: A284071