|
|
A197198
|
|
Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,1,3,2,0 for x=0,1,2,3,4
|
|
1
|
|
|
13, 178, 1801, 21803, 247053, 2873141, 33176391, 383262156, 4432780869, 51234398070, 592247668688, 6846309893866, 79142347014020, 914861421385891, 10575600998801299, 122251698517890245, 1413202926345456663
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
Every 0 is next to 0 4's, every 1 is next to 1 1's, every 2 is next to 2 3's, every 3 is next to 3 2's, every 4 is next to 4 0's
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=4
..1..1..0..0..0..1..1....0..0..0..0..0..1..1....0..0..0..0..1..1..0
..0..0..1..0..1..0..0....0..0..1..0..1..0..0....0..0..0..0..0..0..0
..0..0..1..0..1..0..0....0..0..1..0..1..0..0....1..1..0..0..0..0..1
..0..0..0..0..0..1..1....0..0..0..0..0..1..1....0..0..1..1..0..0..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|