Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
%I #9 Dec 04 2023 01:35:19
%S 6,60,916,16698,336210,7218768
%N Number of fixed (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 (A075678), (D,D)-polyominoids are D-dimensional polyominoes (A001168, A001931, A151830, ...), and (D,1)-polyominoids are polysticks in D dimensions (A096267, A365560, A365562, ...).
%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. A366334 (free).
%Y 46th row of A366767.
%Y Fixed (D,d)-polyominoids:
%Y D\d| 1 2 3 4
%Y ---+--------------------------------
%Y 1 | A000012
%Y 2 | A096267 A001168
%Y 3 | A365560 A075678 A001931
%Y 4 | A365562 A366335 A366337 A151830
%K nonn,hard,more
%O 1,1
%A _Pontus von Brömssen_, Oct 07 2023