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.

1, 1, 2, 4, 12, 27, 106, 339, 1336, 5029

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