1,1

Next term has 133 digits. - Sean A. Irvine, Jan 20 2012

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).

Table of n, a(n) for n=1..7.

Index entries for sequences related to switching networks

Sequence in context: A019015 A305217 A316797 * A306042 A194364 A338439

Adjacent sequences: A000859 A000860 A000861 * A000863 A000864 A000865

nonn

N. J. A. Sloane

More terms from Sean A. Irvine, Jan 19 2012

approved