%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