

A292065


Number of Besźel [Beszel] Polycubes with n cells, distinguishing 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. A292157: Number of Besźel Polycubes with n cells, identifying mirror images; A000162: Number of polycubes with n cells [distinguishing mirror images].
Sequence in context: A148173 A148174 A232218 * A193893 A096581 A275434
Adjacent sequences: A292062 A292063 A292064 * A292066 A292067 A292068


KEYWORD

nonn,more,hard


AUTHOR

George Sicherman, Sep 08 2017


STATUS

approved



