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A000833 Number of switching networks (see Harrison reference for precise definition).
(Formerly M5093 N2205)
0
20, 220, 23932, 2390065448, 1320590620757744871288, 51897350327827018479313921072100496772300552736 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

Next term has 101 digits. [Sean A. Irvine, Jan 20, 2012]

Number of equivalence classes with GL_n(Z_2) operating on the domain and symmetric group of 3 variables operating on the range. [Sean A. Irvine, Jan 20, 2012]

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

Index entries for sequences related to switching networks

CROSSREFS

Sequence in context: A004411 A140354 A155673 * A178261 A054329 A112503

Adjacent sequences:  A000830 A000831 A000832 * A000834 A000835 A000836

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

EXTENSIONS

More terms from Sean A. Irvine (sairvin(AT)xtra.co.nz), Jan 19 2012

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Last modified February 16 17:48 EST 2012. Contains 205939 sequences.