A222568 Number of nX3 0..2 arrays with no more than floor(nX3/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order

1, 5, 11, 120, 500, 5210, 20889, 229894, 913405, 10427244, 40896923, 479942958, 1866795781, 22316526370, 86377362833, 1045093746614, 4036724271985, 49216523120074, 190041618262033, 2328483132653366, 8997015510376997

Offset

1,2

Comments

Column 3 of A222573

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A041909 A041048 A354022 * A248253 A262309 A266421

Adjacent sequences: A222565 A222566 A222567 * A222569 A222570 A222571

Keyword

nonn

Author

R. H. Hardin Feb 25 2013

Status

approved