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%I #6 Aug 14 2019 07:52:03
%S 1,2,5,12,28,70,161,386,932,2226,5254,12748,30228,72192
%N Number of permutations of length n whose powers all avoid the pattern 321.
%H Amanda Burcroff and Colin Defant, <a href="https://arxiv.org/abs/1907.09451">Pattern-Avoiding Permutation Powers</a>, arXiv:1907.09451 [math.CO], 2019.
%Y Cf. A326761, A326762, A326763.
%K nonn,more
%O 1,2
%A _Amanda Burcroff_, Jul 23 2019
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