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%I #4 Oct 20 2022 12:44:06
%S 1,0,0,0,0,1,0,0,0,1,0,1,0,1,0,0,0,2,0,1,1,1,0,1,0,1,0,0,0,1,0,0,0,1,
%T 0,2,0,1,1,0,0,2,0,0,0,1,0,2,0,2,0,1,0,5,1,1,1,1,0,3,0,1,0,0,0,1,0,1,
%U 0,1,0,6,0,1,1,0,0,2,0,1,0,1,0,2,0,1,0,0,0,2,0,0,1,1,0,5,0,2,0,5
%N Number of groups of order n with trivial center.
%C A357900 is the main sequence.
%Y Cf. A357900, A060702 (indices of terms > 0).
%K nonn,hard
%O 1,18
%A _Jianing Song_, Oct 20 2022
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