|
|
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
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
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
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|