A000856 - OEIS

%I M3108 N1259 #21 Apr 01 2017 00:30:22

%S 3,24,1676,22920064,19218307944059712,

%T 59076800018995725211209511239630848,

%U 2871827610052485008814239127114787142200471197616427462842969283498868736

%N Number of n-input 2-output switching networks under the action of S(n) on the inputs and S(2) and complementing group C(2,2) on the outputs

%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_, Aug 10 2011