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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; text; 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
CROSSREFS
Sequence in context: A004411 A140354 A155673 * A302661 A178261 A054329
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Sean A. Irvine, Jan 19 2012
STATUS
approved

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Last modified June 15 09:53 EDT 2024. Contains 373407 sequences. (Running on oeis4.)