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A222873 Number of nX3 0..3 arrays with no more than floor(nX3/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order 1
2, 122, 6282, 443510, 23794078, 1698174722, 93656293632, 6637413406814, 372075279639542, 26219034320665058, 1485998820062892388, 104217650825897197592, 5955892893018468638926, 416011416350266218862952 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A222878

LINKS

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

EXAMPLE

Some solutions for n=3

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

..2..1..0....1..3..0....1..2..3....0..2..0....1..2..2....0..2..1....1..2..1

..2..2..1....0..2..3....3..0..3....1..1..3....0..3..2....1..0..2....0..3..0

CROSSREFS

Sequence in context: A332112 A074490 A056638 * A325889 A013475 A013471

Adjacent sequences:  A222870 A222871 A222872 * A222874 A222875 A222876

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 08 2013

STATUS

approved

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Last modified January 23 21:44 EST 2022. Contains 350515 sequences. (Running on oeis4.)