A000845 Number of switching networks (see Harrison reference for precise definition). (Formerly M4570 N1947)

8, 106, 49008, 91901007752, 2579044825238020792325632, 17027728231845024377254356563216673341241082335920128, 7634627316699699128123263912340182782717075954250211317249456247129155629314608610294934410743206996562935808

Offset

1,1

Comments

Number of equivalence classes with permutation and complementation of n variables on the domain and complementation of 3 variables on the range. - Sean A. Irvine, Aug 07 2011

References

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.

M. A. Harrison, On the number of classes of switching networks, Technical Note, ORA Project 04879, University of Michigan, 1962.

M. A. Harrison, On the number of classes of switching networks, J. Franklin Instit., 276 (1963), 313-327.

Index entries for sequences related to switching networks

Crossrefs

Sequence in context: A099695 A236953 A345474 * A199658 A027013 A365818

Adjacent sequences: A000842 A000843 A000844 * A000846 A000847 A000848

Keyword

nonn

Author

N. J. A. Sloane

Extensions

More terms from Sean A. Irvine, Aug 07 2011

Status

approved