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%I #5 Dec 12 2015 16:19:40
%S 1,1,1,2,0,3,0,4,0,0,11,12,13,0,5,8,0,42,38,50,7,77,115,120,125,117,
%T 135,210,348,645,837,928,792,986
%N Number of length-n 0..2 arrays connected end-around, with no sequence of L<n elements immediately followed by itself (periodic "squarefree"), and new values introduced in order 0..2.
%C Column 2 of A215401.
%e All solutions for n=6:
%e ..0....0....0
%e ..1....1....1
%e ..2....0....2
%e ..1....2....0
%e ..0....1....2
%e ..2....2....1
%K nonn
%O 1,4
%A _R. H. Hardin_, Aug 09 2012
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