A366002 Number of fixed polyominoids with n cells, allowing right-angled corner-connections and flat edge-connections.

3, 30, 506, 10221, 226845, 5325630, 129882894, 3256851183

Offset

1,1

Links

Table of n, a(n) for n=1..8.

Wikipedia, Polyominoid.

Index entries for sequences related to polyominoes.

Crossrefs

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

Cf. A366001 (free).

24th row of A366767.

Sequence in context: A354261 A201466 A064352 * A338278 A144739 A185827

Adjacent sequences: A365999 A366000 A366001 * A366003 A366004 A366005

Keyword

nonn,hard,more

Author

Pontus von Brömssen, Sep 26 2023

Extensions

a(7)-a(8) from Pontus von Brömssen, Nov 02 2025

Status

approved