Number of fixed n-polyominoids, allowing corner-connections only.

A365653

Number of fixed n-polyominoids, allowing corner-connections only.

Terms

    a(0) =3a(1) =30a(2) =554a(3) =12453a(4) =308313a(5) =8055534a(6) =218227200a(7) =6071165262

External references