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A307292
Number of black-and-white colored (or proper magnetic) space groups in dimension n, not counting enantiomorphs.
2
0, 3, 46, 1156, 51987
(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) = A293062(n, n) - 2 * A004029(n). - Andrey Zabolotskiy, Apr 09 2019
CROSSREFS
For the case when enantiomorphs are counted see A307290.
Cf. A004029, A293062.
Sequence in context: A231789 A119401 A124135 * A307290 A193420 A339177
Adjacent sequences: A307289 A307290 A307291 * A307293 A307294 A307295
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 November 7 08:07 EST 2024. Contains 377523 sequences.
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