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Number of fixed n-polyominoids, allowing corner-connections only.
4

%I #10 Dec 04 2023 16:43:51

%S 3,30,554,12453,308313,8055534

%N Number of fixed n-polyominoids, allowing corner-connections only.

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

%Y Cf. A075678 (polyominoids, edge-connections only), A365651 (corner- and edge-connections), A365652 (free).

%Y 27th row of A366767.

%K nonn,hard,more

%O 1,1

%A _Pontus von Brömssen_, Sep 17 2023