A000875 Number of switching networks with S(n) and C(2,2) acting on the domain and GL(3,2) acting on the range. (Formerly M3581 N1452)

4, 21, 2914, 4379140552, 122811659002267408721700, 810844201516429733173715469705141125645071310611982

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..6.

Index entries for sequences related to switching networks

Crossrefs

Sequence in context: A225157 A158947 A000868 * A094046 A326603 A335697

Adjacent sequences: A000872 A000873 A000874 * A000876 A000877 A000878

Keyword

nonn

Author

N. J. A. Sloane

Extensions

More terms from Sean A. Irvine, Jan 25 2012

Status

approved