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A000856
Number of n-input 2-output switching networks under the action of S(n) on the inputs and S(2) and complementing group C(2,2) on the outputs
(Formerly M3108 N1259)
0
3, 24, 1676, 22920064, 19218307944059712, 59076800018995725211209511239630848, 2871827610052485008814239127114787142200471197616427462842969283498868736
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).
CROSSREFS
Sequence in context: A233894 A075655 A300551 * A242117 A047678 A047938
KEYWORD
nonn
EXTENSIONS
More terms from Sean A. Irvine, Aug 10 2011
STATUS
approved