A223128 Number of 3Xn 0..2 arrays with no more than floor(3Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order

5, 72, 1154, 28907, 444555, 11814919, 186184618, 5048458186, 80664693231, 2214177564958, 35719743830427, 988031616090509, 16048574199166554, 446266480581619794, 7286115298409479410, 203387498405308227681

Offset

1,1

Comments

Row 3 of A223126

Links

R. H. Hardin, Table of n, a(n) for n = 1..19

Example

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

Crossrefs

Sequence in context: A092204 A079874 A186664 * A079340 A268782 A282788

Adjacent sequences: A223125 A223126 A223127 * A223129 A223130 A223131

Keyword

nonn

Author

R. H. Hardin Mar 15 2013

Status

approved