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%I #11 Apr 09 2019 03:23:00
%S 0,3,46,1156,51987
%N Number of black-and-white colored (or proper magnetic) space groups in dimension n, not counting enantiomorphs.
%H R. L. E. Schwarzenberger, <a href="https://doi.org/10.1112/blms/16.3.209">Colour symmetry</a>, Bulletin of the London Mathematical Society 16.3 (1984): 216-229.
%H B. Souvignier, <a href="https://doi.org/10.1107/S0108767303004161">Enantiomorphism of crystallographic groups in higher dimensions with results in dimensions up to 6</a>, Acta Cryst., A59 (2003), 210-220.
%F a(n) = A293062(n, n) - 2 * A004029(n). - _Andrey Zabolotskiy_, Apr 09 2019
%Y For the case when enantiomorphs are counted see A307290.
%Y Cf. A004029, A293062.
%K nonn,more
%O 0,2
%A _N. J. A. Sloane_, Apr 08 2019
%E a(0), a(4) from _Andrey Zabolotskiy_, Apr 09 2019
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