A223129 Number of 4Xn 0..2 arrays with no more than floor(4Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order

14, 664, 33604, 1780641, 95995609, 5237368607, 288571160526, 16027080505369, 895863901854996, 50338336373575693, 2840746375350118566, 160894419525331340526, 9140889738498087938175, 520699963561902675358667

Offset

1,1

Comments

Row 4 of A223126

Links

R. H. Hardin, Table of n, a(n) for n = 1..25

Example

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

Crossrefs

Sequence in context: A139196 A336513 A233078 * A303288 A277299 A233506

Adjacent sequences: A223126 A223127 A223128 * A223130 A223131 A223132

Keyword

nonn

Author

R. H. Hardin Mar 15 2013

Status

approved