%I #3 Nov 01 2015 13:53:32
%S 1,2,13,73,710,6079,85311
%N Erroneous version of A004027.
%H W. Plesken and T. Schulz, <a href="http://projecteuclid.org/euclid.em/1045604675">Counting crystallographic groups in low dimensions</a>, Experimental Mathematics, 9 (No. 3, 2000), 407-411.
%K dead
%O 0,2