A365998 Number of fixed polyominoids with n cells, allowing flat corner-connections and any edge-connections.

3, 24, 296, 4248, 66768, 1113395, 19342854, 346270587

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. A365997 (free).

22nd row of A366767.

Sequence in context: A301933 A337027 A326001 * A292186 A365567 A258301

Adjacent sequences: A365995 A365996 A365997 * A365999 A366000 A366001

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