%I M5254 N2286 #19 Feb 01 2022 01:19:09
%S 36,666,384112,735192450952,20632358601785638477436416,
%T 136221825854760195018034839832322234167109566010687488
%N Number of switching networks (see Harrison reference for precise definition).
%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 05 2011