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%I #10 Nov 03 2023 17:01:20
%S 1,2,12,95,1267,22349
%N Number of free (4,2)-polyominoids with n cells.
%C A (D,d)-polyominoid is a connected set of d-dimensional unit cubes with integer coordinates in D-dimensional space, where two cubes are connected if they share a (d-1)-dimensional facet. For example, (3,2)-polyominoids are normal polyominoids (A075679), (D,D)-polyominoids are D-dimensional polyominoes (A000105, A038119, A068870, ...), and (D,1)-polyominoids are polysticks in D dimensions (A019988, A365559, A365561, ...).
%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 46th row of A366766.
%Y Cf. A366335 (fixed).
%Y Free (D,d)-polyominoids:
%Y D\d| 1 2 3 4
%Y ---+--------------------------------
%Y 1 | A000012
%Y 2 | A019988 A000105
%Y 3 | A365559 A075679 A038119
%Y 4 | A365561 A366334 A366336 A068870
%K nonn,hard,more
%O 1,2
%A _Pontus von Brömssen_, Oct 07 2023
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