A000871 Number of switching networks with S(n) acting on the domain and GL(2,2) acting on the range. (Formerly M3981 N1650)

5, 35, 2266, 30564722, 25624410747226866, 78769066691994300606138801216143967, 3829103480069980011752318836153049525544593512352968628868212239132475999

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: A122590 A057991 A395292 * A263882 A035416 A042029

Adjacent sequences: A000868 A000869 A000870 * A000872 A000873 A000874

Keyword

nonn

Author

N. J. A. Sloane

Extensions

More terms from Sean A. Irvine, Jan 25 2012

Status

approved