

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




OFFSET

1,3


COMMENTS

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.


REFERENCES

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


LINKS

Table of n, a(n) for n=1..10.
G. L. Sicherman, Catalogue of Besźel Polycubes


EXAMPLE

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


CROSSREFS

Cf. A292065: Number of Besźel Polycubes with n cells, distinguishing mirror images; A038119: Number of polycubes with n cells, identifying mirror images.
Sequence in context: A104430 A298255 A298926 * A256801 A103669 A230711
Adjacent sequences: A292154 A292155 A292156 * A292158 A292159 A292160


KEYWORD

nonn,more,hard


AUTHOR

George Sicherman, Sep 09 2017


STATUS

approved



