A307290 Number of black-and-white colored (or proper magnetic) space groups in dimension n, counting enantiomorphs.

0, 3, 46, 1191, 52439

Offset

0,2

Links

Table of n, a(n) for n=0..4.

R. L. E. Schwarzenberger, Colour symmetry, Bulletin of the London Mathematical Society 16.3 (1984): 216-229.

B. Souvignier, Enantiomorphism of crystallographic groups in higher dimensions with results in dimensions up to 6, Acta Cryst., A59 (2003), 210-220.

Formula

a(n) = A307291(n) - 2 * A006227(n). - Andrey Zabolotskiy, Apr 09 2019

Crossrefs

Cf. A006227, A307291, A307292.

Sequence in context: A119401 A124135 A307292 * A193420 A339177 A000576

Adjacent sequences: A307287 A307288 A307289 * A307291 A307292 A307293

Keyword

nonn,more

Author

N. J. A. Sloane, Apr 08 2019

Extensions

a(0), a(4) from Andrey Zabolotskiy, Apr 09 2019

Status

approved