A000856 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 (Formerly M3108 N1259)

3, 24, 1676, 22920064, 19218307944059712, 59076800018995725211209511239630848, 2871827610052485008814239127114787142200471197616427462842969283498868736

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: A233894 A075655 A300551 * A242117 A047678 A047938

Adjacent sequences: A000853 A000854 A000855 * A000857 A000858 A000859

Keyword

nonn

Author

N. J. A. Sloane

Extensions

More terms from Sean A. Irvine, Aug 10 2011

Status

approved