%I #20 May 20 2023 08:21:35
%S 1,2,9,88,1103,17570,295506,5168034,92436673
%N Number of polycubes with n cells, allowing edge connections as well as face connections, distinguishing mirror images.
%D Jørgen Lou, Danish Patent 126840 (27 August 1973).
%H G. L. Sicherman, <a href="https://sicherman.net/polykedge/">Catalogue of Polykedges</a>.
%e a(3)=9 because there are 8 ways to join 3 cells in the cubic grid at faces or edges, identifying reflections, and one of those 8 has distinct mirror images, which makes 9.
%Y Cf. A268666 (identifying mirror images), A000162, A030222 (2-dimensional polyplets).
%K nonn,nice,more,hard
%O 1,2
%A _George Sicherman_, Mar 24 2016
%E Terms a(8) and a(9) from _Joerg Arndt_ and _Márk Péter Légrádi_, May 20 2023
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