A207862 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 0 and 1 0 1 vertically

42, 1764, 14406, 117649, 1737981, 25674489, 298294290, 3465676900, 44249929850, 564985239025, 6946276116395, 85401792033481, 1066016616909398, 13306411967110084, 165079309220454794, 2047973443183647529

Offset

1,1

Comments

Row 7 of A207858

Links

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

Example

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

Crossrefs

Sequence in context: A207523 A207258 A207953 * A207812 A208286 A208419

Adjacent sequences: A207859 A207860 A207861 * A207863 A207864 A207865

Keyword

nonn

Author

R. H. Hardin Feb 21 2012

Status

approved