A207692 Number of nX7 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 1 1 vertically

40, 1600, 1296, 5856, 18564, 50096, 145200, 453420, 1403184, 4038800, 12177100, 36992544, 110036104, 332138592, 989787144, 2977771420, 8964400760, 26737629576, 80548970652, 241336844800, 723444785800, 2175007306820

Offset

1,1

Comments

Column 7 of A207693

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..1..1..1..1..1..0..0....0..0..1..1..1..0..1....1..0..1..1..0..1..1
..1..1..0..0..1..1..1....1..1..0..0..1..1..0....1..1..0..1..1..0..0
..0..0..1..1..0..0..1....0..0..1..1..0..1..1....0..1..1..0..0..1..1
..0..1..1..0..1..1..0....0..1..1..1..0..0..1....1..0..0..1..1..0..0

Crossrefs

Sequence in context: A218742 A158703 A209223 * A207927 A208107 A207728

Adjacent sequences: A207689 A207690 A207691 * A207693 A207694 A207695

Keyword

nonn

Author

R. H. Hardin Feb 19 2012

Status

approved