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Least number of inequivalent cells in a polyiamond with n cells.
5

%I #8 Sep 20 2024 10:13:22

%S 1,1,2,2,3,1,3,3,3,3,6,2,4,4,4,4,9,2

%N Least number of inequivalent cells in a polyiamond with n cells.

%C Equivalently, a(n) is the least number of free rooted (or pointed) polyiamonds (A369365) corresponding to a given polyiamond with n cells.

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

%Y Cf. A000577, A367758, A369363, A369365, A369367.

%K nonn,more

%O 1,3

%A _Pontus von Brömssen_, Jan 22 2024

%E a(18) from _John Mason_, Sep 20 2024