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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 1
5, 51, 534, 11114, 125907, 2889947, 34120953, 797183427, 9564934420, 226055677091, 2742385557524, 65313538746516, 798398966331091, 19117977479368059, 235001631223835081, 5649894487466132633 (list; graph; refs; listen; history; text; internal format)
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 A088320 A041040 * A180511 A245926 A190734

Adjacent sequences:  A222999 A223000 A223001 * A223003 A223004 A223005

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 11 2013

STATUS

approved

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Last modified October 23 07:11 EDT 2019. Contains 328336 sequences. (Running on oeis4.)