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%I M4410 N1863 #17 Mar 30 2012 18:39:33
%S 7,34,1056,5884954,2402661748356256,
%T 3692300014084218317379484106943488,
%U 89744612814140156627611342470220985493433638691231381252948710213328896
%N Number of switching networks (see Harrison reference for precise definition).
%C Next term is too big to list here. Equivalence is permutation and complementation of n variables on the domain and permutation of 2 variables on the output. [Sean A. Irvine, Jul 12 2011]
%D M. A. Harrison, On the number of classes of switching networks, J. Franklin Instit., 276 (1963), 313-327.
%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).
%H <a href="/index/Sw#switching">Index entries for sequences related to switching networks</a>
%K nonn
%O 1,1
%A _N. J. A. Sloane_.
%E More terms from _Sean A. Irvine_, Jul 11 2011
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