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A209794
Half the number of (n+1)X7 0..2 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference
1
428676, 182095128, 76648760118, 32342700329739, 13642480312938969, 5755153225046584062, 2427793108137633168210, 1024163896230568622499099, 432042536759800714389833904, 182256830990255873542213582497
OFFSET
1,1
COMMENTS
Column 6 of A209796
LINKS
EXAMPLE
Some solutions for n=4
..0..1..0..2..2..2..0....1..0..1..2..0..1..1....1..1..2..0..2..2..0
..1..1..0..1..1..2..1....2..0..2..2..2..1..2....1..2..2..1..1..1..1
..0..1..1..1..2..2..1....2..2..2..0..0..1..2....1..0..0..0..1..2..1
..0..0..0..0..2..0..1....1..0..1..0..1..1..2....0..0..1..0..2..2..1
..0..1..2..0..0..0..1....0..0..0..0..0..2..2....0..2..2..2..2..0..0
CROSSREFS
Sequence in context: A192228 A234737 A206082 * A234448 A269798 A251639
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 13 2012
STATUS
approved