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A222997 Number of nX3 0..2 arrays with no more than floor(nX3/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order 1
2, 45, 534, 13655, 184475, 4816824, 67178532, 1775642951, 25210032184, 671307448829, 9642197765265, 258026527507712, 3736712737181234, 100342585948460924, 1462116657698476202, 39363517125888222983 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A223000

LINKS

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

EXAMPLE

Some solutions for n=3

..0..1..0....0..1..1....0..1..1....0..1..2....0..1..0....0..1..2....0..1..1

..0..2..0....1..2..0....2..1..2....1..2..0....2..1..1....2..1..0....0..2..0

..2..2..1....1..2..0....2..1..2....1..2..0....2..0..1....0..2..2....0..1..1

CROSSREFS

Sequence in context: A303250 A151583 A325935 * A092654 A209606 A100101

Adjacent sequences:  A222994 A222995 A222996 * A222998 A222999 A223000

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 11 2013

STATUS

approved

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Last modified November 30 06:28 EST 2021. Contains 349419 sequences. (Running on oeis4.)