|
|
A222829
|
|
Number of nX2 0..3 arrays with exactly floor(nX2/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order
|
|
2
|
|
|
0, 4, 32, 613, 7152, 117140, 1613820, 24884991, 363921808, 5535894434, 82950103964, 1261556870873, 19123754052912, 291751166759784, 4451928929497276, 68156252881621777, 1044588670185838192
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=3
..0..1....0..1....0..1....0..1....0..1....0..1....0..0....0..1....0..1....0..1
..0..0....2..2....2..2....2..2....2..2....2..3....1..0....0..2....2..1....2..0
..2..1....2..0....2..3....3..2....0..2....3..3....0..1....0..3....0..1....0..0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|