A097071 Number of Shubnikov compounds.

1, 2, 3, 5, 6, 10, 12, 18, 23, 30

Offset: 1

Author

N. J. A. Sloane, Sep 15 2004

Keywords

• nonn

Comments

The definition is not clear to me.

According to the reference, this is meant to be the number of partitions of n into terms of A018261. So the correct value for a(9) is 22. - Andrey Zabolotskiy, Jul 11 2017

Links

• N. L. Smirnova and V. S. Urusov, Fundamental law of crystal symmetry by Shubnikov, its applications and restrictions, Computers and Mathematics with Applications, 16 (1988), 563-567.