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Least k>1 such that first n terms of A006928 repeat beginning at k-th term.
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%I #5 Mar 30 2012 18:35:25

%S 3,4,4,13,13,19,19,19,19,28,28,28,28,28,28,100,100,405,405,405,405,

%T 405,405,405,608,608,608,608,608,608,608,608,608,608,608,608,608,1096,

%U 1096,1096,1096,1096,1096,1096,1096,1096,1096,1096,1096,1096,1096,1096,1096

%N Least k>1 such that first n terms of A006928 repeat beginning at k-th term.

%K nonn

%O 1,1

%A _David W. Wilson_