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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
OFFSET
0,2
LINKS
R. L. E. Schwarzenberger, Colour symmetry, Bulletin of the London Mathematical Society 16.3 (1984): 216-229.
FORMULA
a(n) = A293062(n, n) - 2 * A004029(n). - Andrey Zabolotskiy, Apr 09 2019
CROSSREFS
For the case when enantiomorphs are counted see A307290.
Sequence in context: A231789 A119401 A124135 * A307290 A193420 A339177
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Apr 08 2019
EXTENSIONS
a(0), a(4) from Andrey Zabolotskiy, Apr 09 2019
STATUS
approved