Number of 4Xn 0..2 arrays with exactly floor(4Xn/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order.
A223117
Number of 4Xn 0..2 arrays with exactly floor(4Xn/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) =184a(2) =6676a(3) =244607a(4) =9329085a(5) =361530918a(6) =14237206760a(7) =566959827679
External references
- oeis: A223117