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A267284 Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any southwest or northwest neighbors modulo 4 and the upper left element equal to 0. 1
6, 5, 24, 137, 1138, 12214, 104742, 741057, 5022782, 35540696, 271621650, 2252475421, 19535278570, 168510129798, 1410939522686, 11518135263919, 93278847927814, 762132469855714, 6339718207407286, 53641859402324039 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A267278.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..24

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A267278.

Sequence in context: A318547 A082384 A248265 * A228969 A256961 A267743

Adjacent sequences:  A267281 A267282 A267283 * A267285 A267286 A267287

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 12 2016

STATUS

approved

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Last modified October 20 08:28 EDT 2021. Contains 348099 sequences. (Running on oeis4.)