A000874 Number of switching networks with S(n) and C(2,2) acting on the domain and GL(2,2) acting on the range. (Formerly M3533 N1433)

4, 16, 392, 1966074, 800887365826790, 1230766671361406290474145896188319, 29914870938046718875870447490073662976109190218710989290080175747776895

Offset

1,1

References

M. A. Harrison, On the number of classes of switching networks, J. Franklin Instit., 276 (1963), 313-327. (Available on-line at http://deepblue.lib.umich.edu/handle/2027.42/5406/.)

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: A202681 A067211 A156337 * A061580 A037976 A013138

Adjacent sequences: A000871 A000872 A000873 * A000875 A000876 A000877

Keyword

nonn

Author

N. J. A. Sloane

Extensions

More terms from Sean A. Irvine, Jan 25 2012

Status

approved