A000841 - OEIS

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A000841

Number of n-input 2-output switching networks under action of symmetric group S(n) on the inputs and complementing group C(2,2) on the outputs.
(Formerly M3675 N1498)

4, 40, 3264, 45826304, 38436615422689280, 118153600037991449448840725115437056, 5743655220104970017628478254229574276569046648639726053254944342556016640

(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

Cf. A000612, A000842.