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A292157 Number of Besźel [Beszel] Polycubes with n cells, identifying mirror images. A Besźel Polycube is a polycube whose cells each have two or more even coordinates. 2

%I

%S 1,1,2,4,11,23,80,230,837,2935

%N Number of Besźel [Beszel] Polycubes with n cells, identifying mirror images. A Besźel Polycube is a polycube whose cells each have two or more even coordinates.

%C This sequence also gives the number of Ul Qoma Polycubes with n cells. An Ul Qoma Polycube is a polycube whose cells each have two or more odd coordinates.

%D China Miéville, The City & the City, Macmillan, 2009.

%H G. L. Sicherman, <a href="http://userpages.monmouth.com/~colonel/beszel/beszel.html">Catalogue of Besźel Polycubes</a>

%e a(4) = 4 because 4 of the 8 tetracubes (I, L, T, K) can be embedded in the Besźel section of the cubic grid.

%Y Cf. A292065: Number of Besźel Polycubes with n cells, distinguishing mirror images; A038119: Number of polycubes with n cells, identifying mirror images.

%K nonn,more,hard

%O 1,3

%A _George Sicherman_, Sep 09 2017

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Last modified July 28 07:39 EDT 2021. Contains 346321 sequences. (Running on oeis4.)