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Regular coverings having dihedral voltage groups: see Kwak-Lee reference in A160870 for precise definition.
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%I #2 Mar 30 2012 16:51:24

%S 4,29,281,3231,42099

%N Regular coverings having dihedral voltage groups: see Kwak-Lee reference in A160870 for precise definition.

%K nonn

%O 1,1

%A _N. J. A. Sloane_, Nov 15 2009