Additionally the OEIS now contains a wrong fact [1] - the sequences are offset by one. I am not even convinced that 2n - 2 is optimal - does somebody know if it

Additionally the OEIS now contains a wrong fact [1] - the sequences are offset by one. I am not even convinced that 2n - 2 is optimal - does somebody know if it is or can proof a better lower bound than the trivial n? [1] http://oeis.org/A058992 http://oeis.org/A058992