A208077 Number of n X 7 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 0 1 0 vertically.

42, 1764, 30114, 514089, 10751415, 224850025, 4412968520, 86610135616, 1738407943480, 34892708070025, 694522498347405, 13824134823318561, 276034376753148762, 5511735679904794404, 109923500301084440190

Offset

1,1

Comments

Column 7 of A208078.

Links

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

Example

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

Crossrefs

Cf. A208078.

Sequence in context: A207807 A208368 A207716 * A009986 A041841 A236270

Adjacent sequences: A208074 A208075 A208076 * A208078 A208079 A208080

Keyword

nonn

Author

R. H. Hardin, Feb 23 2012

Status

approved