A222916 Number of nX5 0..2 arrays with exactly floor(nX5/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order

16, 654, 17518, 1309863, 26742406, 2133576918, 43875762623, 3643286829221, 76890372039924, 6535580567066928, 141130344695671712, 12166904908881796439, 267360083380015562049, 23255314139393869641038, 517565824894996299344331

Offset

1,1

Comments

Column 5 of A222918

Links

R. H. Hardin, Table of n, a(n) for n = 1..22

Example

Some solutions for n=3
..0..1..2..1..0....0..1..0..2..0....0..1..1..2..1....0..1..0..2..2
..2..0..2..0..0....2..2..0..0..2....1..1..0..2..2....2..2..2..0..1
..1..2..2..1..2....2..1..2..1..0....0..2..1..0..1....0..0..1..2..0

Crossrefs

Sequence in context: A249950 A334734 A220298 * A346181 A197407 A197429

Adjacent sequences: A222913 A222914 A222915 * A222917 A222918 A222919

Keyword

nonn

Author

R. H. Hardin Mar 09 2013

Status

approved