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A267224 Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its west, northeast or southeast neighbor modulo 4 and the upper left element equal to 0. 1
6, 35, 458, 7137, 127262, 2409733, 47615756, 971807573, 20350582884, 435153995835, 9465755318980, 208865043851697, 4664235238647148, 105225575250055043, 2394702914722332876, 54911344462256296581 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A267222.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..19

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A267222.

Sequence in context: A291595 A268139 A051337 * A192996 A192997 A152128

Adjacent sequences:  A267221 A267222 A267223 * A267225 A267226 A267227

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 12 2016

STATUS

approved

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Last modified September 20 12:05 EDT 2021. Contains 347586 sequences. (Running on oeis4.)