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A000829 Number of switching networks (see Harrison reference for precise definition).
(Formerly M4410 N1863)
0
7, 34, 1056, 5884954, 2402661748356256, 3692300014084218317379484106943488, 89744612814140156627611342470220985493433638691231381252948710213328896 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Next term is too big to list here. Equivalence is permutation and complementation of n variables on the domain and permutation of 2 variables on the output. [Sean A. Irvine, Jul 12 2011]

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: A232043 A027683 A196968 * A247158 A285802 A061825

Adjacent sequences:  A000826 A000827 A000828 * A000830 A000831 A000832

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Sean A. Irvine, Jul 11 2011

STATUS

approved

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Last modified October 14 12:31 EDT 2019. Contains 328006 sequences. (Running on oeis4.)