[seqfan] Re: Observation on A165961- Number of circular permutations of length n without 3-sequences

David Scambler dscambler at bmm.com
Fri Apr 1 07:18:41 CEST 2011

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> Apparently also permutations of length n-1 without consecutive fixed points.
> Is this known? Obvious?

Yes it is known. See for example A180187<https://oeis.org/A180187>

dave

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