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A326760
Number of permutations of length n whose powers all avoid the pattern 321.
3
1, 2, 5, 12, 28, 70, 161, 386, 932, 2226, 5254, 12748, 30228, 72192
OFFSET
1,2
LINKS
Amanda Burcroff and Colin Defant, Pattern-Avoiding Permutation Powers, arXiv:1907.09451 [math.CO], 2019.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Amanda Burcroff, Jul 23 2019
STATUS
approved