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A222495 Number of nX3 0..3 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order 1
0, 4, 6, 95, 525, 7420, 40428, 636953, 3473192, 57944170, 307452564, 5382036893, 27808882969, 505897592674, 2555395714322, 47885314854974, 237764769206647, 4553475954110482, 22336733995345136, 434447462103135220 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A222500

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..206

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A245011 A012897 A013079 * A087934 A052684 A213128

Adjacent sequences:  A222492 A222493 A222494 * A222496 A222497 A222498

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 23 2013

STATUS

approved

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Last modified January 18 01:36 EST 2019. Contains 319260 sequences. (Running on oeis4.)