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A266996
Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its west, northeast or northwest neighbor modulo 4 and the upper left element equal to 0.
1
6, 23, 126, 943, 8360, 87289, 1073932, 14863289, 227066403, 3688250645, 62544807055, 1087937056186, 19275800685449, 345623392929734, 6258184177158268, 114122197400700402, 2094043644897109885
OFFSET
1,1
COMMENTS
Row 4 of A266994.
LINKS
EXAMPLE
Some solutions for n=6
..0..2..2..1..1..0....0..0..0..3..3..2....0..0..3..3..3..2....0..2..1..3..1..0
..2..2..1..1..0..0....2..0..3..3..1..1....0..2..2..2..1..1....2..0..2..0..2..0
..2..1..0..3..3..3....0..2..2..1..1..1....0..0..2..1..1..3....2..1..3..1..3..2
..0..2..1..3..3..3....2..2..1..0..3..3....2..0..3..1..1..3....3..1..0..3..1..3
CROSSREFS
Cf. A266994.
Sequence in context: A369835 A369831 A063383 * A013263 A013259 A012468
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 08 2016
STATUS
approved