%I M3927 N1615 #15 Jun 01 2017 23:26:51
%S 1,5,23,1681,257543,67637281,27138236663,15442193173681
%N Erroneous version of A002439.
%D N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%K dead
%O 1,2