|
|
A196487
|
|
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,3,0,1,4 for x=0,1,2,3,4
|
|
0
|
|
|
1, 1, 9, 99, 2862, 188603, 28338246, 10179007465, 8440119388684, 16385876855589022, 74005549246712939357, 780142920501811666245635
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,3
|
|
COMMENTS
|
Every 0 is next to 0 2's, every 1 is next to 1 3's, every 2 is next to 2 0's, every 3 is next to 3 1's, every 4 is next to 4 4's
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=4
..0..1..3..1....1..1..3..1....0..0..0..0....1..3..1..0....1..3..1..0
..0..0..1..0....3..1..1..1....1..1..3..1....0..1..1..0....1..1..0..1
..1..3..1..0....1..0..1..3....3..1..1..0....0..1..3..1....3..1..1..3
..0..1..0..0....0..0..0..1....1..0..0..0....0..0..0..0....1..0..0..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|