Number of 2Xn 0..2 arrays with exactly floor(2Xn/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order.
A223115
Number of 2Xn 0..2 arrays with exactly floor(2Xn/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order.
Terms
- a(0) =0a(1) =4a(2) =28a(3) =124a(4) =832a(5) =6092a(6) =40960a(7) =284702a(8) =1978008a(9) =13815432a(10) =97060752a(11) =684943720a(12) =4843134784a(13) =34353796672a(14) =244220744192
External references
- oeis: A223115