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A000859
Number of n-input 2-output switching networks under action of S(n) and complementing group C(2,2) on inputs and outputs.
(Formerly M2963 N1198)
0
3, 13, 308, 1476218, 600665577652576, 923075003521054806676605033098240, 22436153203535039156902835617555247833069649686831685624592283895635968
OFFSET
1,1
REFERENCES
M. A. Harrison, On the number of classes of switching networks, J. Franklin Instit., 276 (1963), 313-327.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
CROSSREFS
Sequence in context: A132560 A128385 A100524 * A045748 A113526 A113612
KEYWORD
nonn
EXTENSIONS
More terms from Sean A. Irvine, Aug 10 2011
STATUS
approved