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Number of fixed polyominoids with n cells, allowing right-angled corner-connections and right-angled edge-connections.
3

%I #9 Dec 04 2023 16:44:28

%S 3,36,700,15426,368154

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

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

%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Polyominoid">Polyominoid</a>.

%H <a href="/index/Pol#polyominoes">Index entries for sequences related to polyominoes</a>.

%Y Cf. A365995, A366003 (free).

%Y 25th row of A366767.

%K nonn,hard,more

%O 1,1

%A _Pontus von Brömssen_, Sep 28 2023