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A207763
Number of 3Xn 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 1 and 1 0 1 vertically
2
6, 36, 82, 221, 493, 1095, 2654, 6203, 14182, 33242, 77781, 180207, 419683, 979186, 2277663, 5301348, 12351370, 28755901, 66942929, 155895195, 362997882, 845159395, 1967953186, 4582333234, 10669471213, 24843252803, 57846384111
OFFSET
1,1
COMMENTS
Row 3 of A207762
LINKS
FORMULA
Empirical: a(n) = a(n-1) +8*a(n-3) +a(n-5) -12*a(n-6) -3*a(n-7) +a(n-8) +10*a(n-9) -2*a(n-10) -3*a(n-12) for n>14
EXAMPLE
Some solutions for n=4
..1..1..1..0....0..1..1..1....0..1..0..0....1..1..0..0....1..1..1..0
..0..0..1..0....0..1..0..0....1..1..0..0....1..0..0..1....0..0..1..1
..0..0..1..1....0..1..0..0....0..1..1..1....0..0..1..0....0..0..1..0
CROSSREFS
Sequence in context: A207483 A207264 A207270 * A207347 A207769 A207896
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 19 2012
STATUS
approved