A000818 Number of switching networks under action of GL_n(Z_2). (Formerly M5331 N2319)

64, 960, 135040, 14333211520, 7923543700147758911104, 311384101966962110823277061581833720077525851776

Offset

1,1

Comments

See Harrison reference for precise definition.

Next term has 102 digits. - Sean A. Irvine, Jan 19 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

Table of n, a(n) for n=1..6.

Index entries for sequences related to switching networks

Crossrefs

Sequence in context: A303015 A302819 A303512 * A220678 A224162 A224413

Adjacent sequences: A000815 A000816 A000817 * A000819 A000820 A000821

Keyword

nonn

Author

N. J. A. Sloane

Extensions

More terms from Sean A. Irvine, Jan 18 2012

Status

approved