The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #5 Dec 12 2015 16:21:06
%S 1,1,1,3,6,27,99,463,2232,11839,66176,390465,2394678,15154985,
%T 98121614,646053822,4304919741,28930077597
%N Number of length-n 0..7 arrays connected end-around, with no sequence of L<n elements immediately followed by itself (periodic "squarefree"), and new values introduced in order 0..7.
%C Column 7 of A215401.
%e Some solutions for n=9:
%e ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
%e ..1....1....1....1....1....1....1....1....1....1....1....1....1....1....1....1
%e ..2....2....2....2....2....2....2....2....2....0....2....0....2....2....2....2
%e ..1....3....3....0....3....3....3....3....1....2....3....2....3....3....3....0
%e ..3....1....1....3....4....4....4....4....3....1....1....3....1....4....4....3
%e ..2....3....4....4....1....1....1....2....4....2....4....0....3....1....0....1
%e ..1....2....5....3....3....5....5....4....5....3....1....2....4....4....2....3
%e ..2....4....6....2....2....4....0....0....3....1....2....1....0....5....0....4
%e ..4....5....3....1....5....2....2....2....6....2....1....4....5....1....5....1
%K nonn
%O 1,4
%A _R. H. Hardin_, Aug 09 2012