OFFSET
1,2
COMMENTS
Engen-Vatter say these values are "suggested", so presumably they have not yet been confirmed.
LINKS
R. Arratia, On the Stanley-Wilf conjecture for the number of permutations avoiding a given pattern., Electron. J. Combin. 6, N1 (1999).
Michael Engen and Vincent Vatter, Containing all permutations, Amer. Math. Monthly, 128 (2021), 4-24; arXiv preprint, arXiv:1810.08252 [math.CO], 2018-2020.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Feb 13 2021
STATUS
approved