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%I #10 Nov 04 2023 18:24:39
%S 1,3,30,531,13095
%N Number of free polyominoids with n cells, allowing any corner-connections and right-angled edge-connections.
%C See A365995 for further details and a table of related sequences.
%H Pontus von Brömssen, <a href="/A366009/a366009.svg">Illustration for sizes 1..3</a>.
%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, A366010 (fixed).
%Y 29th row of A366766.
%K nonn,hard,more
%O 1,2
%A _Pontus von Brömssen_, Sep 28 2023