A366009 Number of free polyominoids with n cells, allowing any corner-connections and right-angled edge-connections.

1, 3, 30, 531, 13095

Offset: 1

Author

Pontus von Brömssen, Sep 28 2023

Keywords

• nonn
• hard
• more

Comments

See A365995 for further details and a table of related sequences.

Links

• Pontus von Brömssen, Illustration for sizes 1..3.
• Wikipedia, Polyominoid.
• Index entries for sequences related to polyominoes.

Crossrefs

Cf. A365995, A366010 (fixed).

29th row of A366766.