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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 (list; graph; refs; listen; history; text; internal format)
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).

LINKS

Table of n, a(n) for n=1..7.

Index entries for sequences related to switching networks

CROSSREFS

Sequence in context: A132560 A128385 A100524 * A045748 A113526 A180654

Adjacent sequences:  A000856 A000857 A000858 * A000860 A000861 A000862

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

EXTENSIONS

More terms from Sean A. Irvine, Aug 10 2011

STATUS

approved

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Last modified July 6 02:43 EDT 2020. Contains 335475 sequences. (Running on oeis4.)