%I A001150 M2960 N1196
%S A001150 3,13,146,40422
%N A001150 Number of switching networks (see Harrison reference for precise definition).
%D A001150 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A001150 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A001150 M. A. Harrison, On the number of classes of switching networks, J. Franklin 
               Instit., 276 (1963), 313-327.
%H A001150 <a href="Sindx_Sw.html#switching">Index entries for sequences related 
               to switching networks</a>
%Y A001150 Sequence in context: A054933 A130589 A041591 this_sequence A108554 A014376 
               A065622
%Y A001150 Adjacent sequences: A001147 A001148 A001149 this_sequence A001151 A001152 
               A001153
%K A001150 nonn
%O A001150 1,1
%A A001150 N. J. A. Sloane (njas(AT)research.att.com).