|
|
A222503
|
|
Number of 4Xn 0..3 arrays with exactly floor(4Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order
|
|
0
|
|
|
0, 13, 95, 346, 3915, 43771, 524135, 8524766, 122168747, 2165841197, 32515663543, 574481348902, 8775347781607, 153616441788561, 2375537033236755
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=4
..0..0..1..2....0..0..0..0....0..0..0..0....0..0..1..0....0..0..0..1
..2..0..0..0....0..0..0..0....0..1..0..1....2..1..1..1....0..0..2..0
..0..0..0..0....0..1..0..0....0..0..0..0....1..1..1..1....0..0..0..0
..0..0..0..0....2..1..0..0....0..0..0..0....1..1..1..1....0..0..0..0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|