Number of free polyominoids with n cells, allowing right-angled corner-connections and flat edge-connections.
A366001
Number of free polyominoids with n cells, allowing right-angled corner-connections and flat edge-connections.
Terms
- a(0) =1a(1) =2a(2) =18a(3) =243a(4) =4881a(5) =111697a(6) =2709778
External references
- oeis: A366001