A223002 Number of 3Xn 0..2 arrays with no more than floor(3Xn/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order

5, 51, 534, 11114, 125907, 2889947, 34120953, 797183427, 9564934420, 226055677091, 2742385557524, 65313538746516, 798398966331091, 19117977479368059, 235001631223835081, 5649894487466132633

Offset

1,1

Comments

Row 3 of A223000

Links

R. H. Hardin, Table of n, a(n) for n = 1..51

Example

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

Crossrefs

Sequence in context: A212819 A041040 A088320 * A370172 A180511 A245926

Adjacent sequences: A222999 A223000 A223001 * A223003 A223004 A223005

Keyword

nonn

Author

R. H. Hardin Mar 11 2013

Status

approved