%N Number of n-edge 3-connected planar maps with a sense-reversing automorphism.
%C Maps are counted up to isomorphism which is not restricted to those that preserve the orientation of the sphere.
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%D Computed by Nick Wormald (unpublished).
%H T. R. S. Walsh, <a href="/A007401/a007401.pdf">Number of sensed planar maps with n edges and m vertices</a>
%A _N. J. A. Sloane_, T. R. S. Walsh, personal communication