A000890 Number of switching networks with S(n) and C(2,2) acting on the domain and AG(2,3) acting on the range. (Formerly M1908 N0753)

2, 8, 502, 547849868, 15351457458188948591044, 101355525189553716762153010939347719113626111895054, 45444210218450590048352761382977278474163061892945988503535816179384800906003492121663432508203634748567436

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

M. A. Harrison, On the number of classes of (n,k) switching networks, University of Michigan (1962).

Crossrefs

Sequence in context: A329685 A323863 A003301 * A033542 A098870 A221065

Adjacent sequences: A000887 A000888 A000889 * A000891 A000892 A000893

Keyword

nonn

Author

N. J. A. Sloane

Extensions

More terms from Sean A. Irvine, Jan 26 2012

Status

approved