A207894 Number of nX7 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 0 and 1 1 1 vertically

28, 784, 2520, 20168, 135714, 856480, 5888458, 39828558, 260749390, 1761010222, 11829617422, 78462173820, 526979351782, 3530615876490, 23530243300772, 157698231146356, 1055466664497864, 7048335728590736, 47191056299318688

Offset

1,1

Comments

Column 7 of A207895

Links

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

Example

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

Crossrefs

Sequence in context: A208505 A207878 A207681 * A207884 A207761 A207168

Adjacent sequences: A207891 A207892 A207893 * A207895 A207896 A207897

Keyword

nonn

Author

R. H. Hardin Feb 21 2012

Status

approved