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A272368 Number of polycubes with n cells, allowing vertex connections and edge connections as well as face connections, identifying mirror images. 6

%I #28 Nov 04 2023 13:50:07

%S 1,3,14,165,2676,59541,1448610,37029315,971243592

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

%e There are 3 ways to join two cells of the cubic grid at faces, edges, or vertices, so a(2) = 3.

%Y Cf. A272385 (distinguishing mirror images), A268666 (no vertex connections), A038119 (face connections only).

%Y 38th row of A366766.

%K nonn,nice,more,hard

%O 1,2

%A _George Sicherman_, Apr 27 2016

%E a(8) and a(9) from _Joerg Arndt_ and _Márk Péter Légrádi_, May 28 2023

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Last modified April 24 09:18 EDT 2024. Contains 371935 sequences. (Running on oeis4.)