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

1, 3, 30, 531, 13095

Offset

1,2

Comments

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

Links

Table of n, a(n) for n=1..5.

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.

Sequence in context: A338278 A144739 A185827 * A370910 A377554 A375871

Adjacent sequences: A366006 A366007 A366008 * A366010 A366011 A366012

Keyword

nonn,hard,more

Author

Pontus von Brömssen, Sep 28 2023

Status

approved