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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

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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