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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A230401 Number of nonisomorphic synchronizing binary n-state automata without output under input permutations.

Original entry on oeis.org

1, 4, 51, 1115, 34265, 1318699, 60477844, 3210707626, 193589241468, 13070085476528
Offset: 1

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Author

Marek Szykula, Oct 18 2013

Keywords

Comments

An automaton with the state set Q is synchronizing if there exists a word w such that |Qw|=1.

Examples

			For n=2 there are 4 such automata:
[0 a 0,0 b 1,1 a 0,1 b 0],
[0 a 0,0 b 0,1 a 0,1 b 0],
[0 a 0,0 b 1,1 a 0,1 b 1], and
[0 a 0,0 b 0,1 a 1,1 b 0].

References

  • A. Kisielewicz and M. Szykuła, Generating Small Automata and the Černý Conjecture, in Implementation and Application of Automata, volume 7982 of LNCS, pages 340-348, 2013.

Crossrefs

Cf. A054745, A054746, A230326.
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