

A245686


Number of nonisomorphic synchronizing strongly connected binary nstate automata without output under input permutations.


0




OFFSET

2,1


COMMENTS

Number of 2sets of transformations, up to conjugation, generating a transitive semigroup on n points that contains a constant transformation.


LINKS

Table of n, a(n) for n=2..10.
Jakub Kowalski and Marek Szykuła, The Černý conjecture for small automata: experimental report, arxiv preprint, January 2013.
James Mitchell, Semigroups data (contains links to files containing the 2element sets of transformations on n points (up to conjugation) which generate a transitive semigroup containing a constant transformation).


CROSSREFS

Sequence in context: A228384 A216281 A263625 * A091315 A087546 A090729
Adjacent sequences: A245683 A245684 A245685 * A245687 A245688 A245689


KEYWORD

nonn,more


AUTHOR

James Mitchell, Jul 29 2014


STATUS

approved



