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A307290 Number of black-and-white colored (or proper magnetic) space groups in dimension n, counting enantiomorphs. 2
0, 3, 46, 1191, 52439 (list; graph; refs; listen; history; text; internal format)
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

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Last modified September 28 04:53 EDT 2021. Contains 347703 sequences. (Running on oeis4.)