A000877 Number of switching networks with GL(n,2) acting on the domain and GL(2,2) acting on the range. (Formerly M3910 N1605)

5, 20, 206, 54155, 309771751363, 2813362279226503905263636259, 117782620520968191503190785913014275478335890027037842956986579

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: A197741 A189317 A203902 * A203113 A077817 A032324

Adjacent sequences: A000874 A000875 A000876 * A000878 A000879 A000880

Keyword

nonn

Author

N. J. A. Sloane

Extensions

More terms from Sean A. Irvine, Jan 25 2012

Status

approved