Number of nX4 0..2 arrays with exactly floor(nX4/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order.
A222887
Number of nX4 0..2 arrays with exactly floor(nX4/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order.
Terms
- a(0) =6a(1) =184a(2) =8986a(3) =465938a(4) =24893100a(5) =1351294947a(6) =74202775749
External references
- oeis: A222887