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Number of fixed n-polyominoids, allowing both corner- and edge-connections.
4

%I #10 Dec 04 2023 16:43:38

%S 3,48,1072,27732,781200

%N Number of fixed n-polyominoids, allowing both corner- and edge-connections.

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

%Y Cf. A001168 (polyominoes), A006770 (polyplets), A075678 (polyominoids), A365650 (free), A365653 (corner-connections only).

%Y 30th row of A366767.

%K nonn,hard,more

%O 1,1

%A _Pontus von Brömssen_, Sep 17 2023