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

Author

George Sicherman, Sep 08 2017

Keywords

• nonn
• more
• hard

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.

Examples

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

References

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

Links

• G. L. Sicherman, Catalogue of Besźel Polycubes

Crossrefs

Cf. A292157: Number of Besźel Polycubes with n cells, identifying mirror images; A000162: Number of polycubes with n cells [distinguishing mirror images].