OFFSET
1,3
COMMENTS
Comment from F. Chapoton, Sep 14 2021: (Start)
The maps sending a permutation to its inverse or to its reverse-complement define two commuting involutions on these sets of permutations.
The next terms in the sequence could be 41648, 130178, though these are counting Dyck words such that an associated permutation is cyclic, related but not obviously equivalent combinatorial objects. (End)
LINKS
Miklos Bona and Michael Cory, Cyclic Permutations Avoiding Pairs of Patterns of Length Three, arXiv:1805.05196 [math.CO], 2018.
EXAMPLE
For n=3, there are two such permutations, 231 and 312.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Miklos Bona, Aug 05 2019
STATUS
approved