A366000 Number of fixed polyominoids with n cells, allowing right-angled corner-connections.

3, 24, 344, 6024, 117756, 2453722, 53294964, 1191589056

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. A365999 (free).

23rd row of A366767.

Sequence in context: A144003 A334775 A153389 * A375800 A332975 A010791

Adjacent sequences: A365997 A365998 A365999 * A366001 A366002 A366003

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