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A215395
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.
0
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, 135, 210, 348, 645, 837, 928, 792, 986
OFFSET
1,4
COMMENTS
Column 2 of A215401.
EXAMPLE
All solutions for n=6:
..0....0....0
..1....1....1
..2....0....2
..1....2....0
..0....1....2
..2....2....1
CROSSREFS
Sequence in context: A234580 A352740 A108416 * A338569 A343757 A108760
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 09 2012
STATUS
approved