A000830 Number of switching networks (see Harrison reference for precise definition). (Formerly M4913 N2106)

13, 158, 66336, 122544034314, 3438726436264160394888822, 22703637642460032506699838997723739937009913804573344

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 3 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..6.

Index entries for sequences related to switching networks

Crossrefs

Sequence in context: A175519 A015470 A084328 * A205170 A205163 A118673

Adjacent sequences: A000827 A000828 A000829 * A000831 A000832 A000833

Keyword

nonn

Author

N. J. A. Sloane

Extensions

More terms from Sean A. Irvine, Jul 11 2011

Status

approved