%I A007631 M0929
%S A007631 2,4,0,2,10,32,38,140,496,1186,3178,16792,82038,289566
%N A007631 Number of solutions to non-attacking reflecting queens problem.
%D A007631 M. Gardner, Fractal Music, Hypercards and More, Freeman, NY, 1991, p. 
               240.
%D A007631 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%Y A007631 Cf. A051224, A051223.
%Y A007631 Sequence in context: A004516 A153182 A111818 this_sequence A155517 A123514 
               A064178
%Y A007631 Adjacent sequences: A007628 A007629 A007630 this_sequence A007632 A007633 
               A007634
%K A007631 nonn,nice
%O A007631 4,1
%A A007631 N. J. A. Sloane (njas(AT)research.att.com), Mira Bernstein, Robert G. 
               Wilson v (rgwv(AT)rgwv.com)