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

Author

R. H. Hardin Feb 25 2013

Keywords

• nonn

Comments

Column 3 of A222573

Examples

			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
		

Links

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