A208063 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 0 1 1 vertically

2, 16, 72, 576, 3696, 26244, 198000, 1638400, 12913840, 117722500, 1052059680, 10059287616, 97769309736, 1020075760144, 10507456855392, 116747852120064, 1295601058976256, 15148523442518244, 177995312325281880

Offset

1,1

Comments

Diagonal of A208069

Links

R. H. Hardin, Table of n, a(n) for n = 1..32

Example

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

Crossrefs

Sequence in context: A208374 A207677 A207508 * A207923 A207839 A216424

Adjacent sequences: A208060 A208061 A208062 * A208064 A208065 A208066

Keyword

nonn

Author

R. H. Hardin Feb 23 2012

Status

approved