Number of free polyominoids with n cells, allowing right-angled corner-connections.
A365999
Number of free polyominoids with n cells, allowing right-angled corner-connections.
Terms
- a(0) =1a(1) =1a(2) =13a(3) =139a(4) =2546a(5) =51416a(6) =1112231
External references
- oeis: A365999