A183394 Half the number of nX3 binary arrays with no element equal to a strict majority of its knight-move neighbors

4, 8, 46, 69, 227, 794, 2701, 9816, 34649, 120536, 434313, 1550296, 5499239, 19551466, 69802571, 249420924, 889851040, 3174899619, 11337371343, 40485754845, 144598455899, 516411037596, 1844321799338, 6587372833183

Offset

1,1

Comments

Column 3 of A183397

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions with a(1,1)=0 for 5X3
..0..0..0....0..1..1....0..0..1....0..1..0....0..0..1....0..0..1....0..0..1
..1..1..0....0..1..1....0..0..1....1..1..0....0..1..1....0..0..1....0..0..1
..1..1..0....0..0..1....0..0..1....1..1..0....0..1..1....0..0..1....0..1..1
..1..1..0....0..1..1....0..0..1....0..1..0....0..0..1....0..1..1....0..0..1
..1..0..0....0..0..1....1..0..1....1..0..1....0..0..1....0..0..1....0..0..1

Crossrefs

Sequence in context: A189538 A351071 A270352 * A291948 A002470 A087261

Adjacent sequences: A183391 A183392 A183393 * A183395 A183396 A183397

Keyword

nonn

Author

R. H. Hardin Jan 04 2011

Status

approved