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A207430
Number of 6Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 0 1 0 vertically
1
21, 441, 3633, 29929, 341329, 3892729, 39698733, 404854641, 4315250265, 45995236225, 481815567745, 5047180107649, 53243344229835, 561670803164025, 5908341620443125, 62151175576890625, 654538444302027625
OFFSET
1,1
COMMENTS
Row 6 of A207426
LINKS
EXAMPLE
Some solutions for n=4
..1..0..0..1....1..1..0..1....0..0..1..1....0..1..1..1....1..0..0..1
..1..1..0..1....1..0..1..1....0..1..1..0....1..0..1..1....1..1..1..1
..1..1..0..0....0..1..1..1....0..1..1..0....1..1..0..1....1..1..1..0
..1..0..0..1....1..1..0..0....0..1..1..0....1..1..0..1....0..1..1..1
..1..1..0..1....1..0..0..1....0..1..1..0....1..0..0..1....1..0..0..1
..1..1..0..1....1..1..0..1....0..1..1..0....1..0..0..1....1..0..1..1
CROSSREFS
Sequence in context: A207121 A207440 A188691 * A208372 A206874 A188504
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 17 2012
STATUS
approved