|
|
A223098
|
|
Number of nX2 0..2 arrays with exactly floor(nX2/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order
|
|
1
|
|
|
0, 6, 16, 280, 1440, 16352, 111104, 1072512, 8281600, 74866176, 614068224, 5409544192, 45696688128, 398896128000, 3421054959616, 29796895916032, 257698176565248, 2245655567138816, 19520497243914240, 170356407824547840
(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..0....0..1....0..0....0..1....0..1
..0..1....1..1....2..2....2..2....1..1....0..1....1..1....0..1....0..0....2..1
..1..1....2..0....2..0....2..1....2..1....0..2....0..1....0..1....0..2....1..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|