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A268666 Number of polycubes with n cells, allowing edge connections as well as face connections, identifying mirror images. 2

%I

%S 1,2,8,64,646,9364,151028

%N Number of polycubes with n cells, allowing edge connections as well as face connections, identifying mirror images.

%e a(2) = 2 because there are two ways to join two cells in the cubic grid at faces or edges.

%Y Cf. A270862 (distinguishing mirror images), A038119, A000162, A030222 (2-dimensional polyplets).

%K nonn,more,nice,hard

%O 1,2

%A _George Sicherman_, Feb 10 2016

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Last modified September 21 19:57 EDT 2019. Contains 327281 sequences. (Running on oeis4.)