A366007 Number of free polyominoids with n cells, allowing any corner-connections and flat edge-connections.

1, 3, 25, 431, 10175

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, A366008 (fixed).

28th row of A366766.