|
|
A207913
|
|
Number of n X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 0 and 1 0 1 vertically
|
|
1
|
|
|
2, 16, 98, 1309, 21145, 612439, 28188778, 2088382007, 241159388724, 45610488555258, 13703703085638203, 6587710602249205713, 5068113112003743826155, 6252316203337352775508286
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=4
..1..1..0..0....0..0..1..0....0..0..1..1....1..1..1..1....0..0..1..0
..0..0..1..0....0..0..1..0....1..0..0..1....1..1..0..0....1..1..0..0
..0..0..1..1....1..1..0..0....1..0..0..1....0..1..0..0....1..1..0..0
..1..0..0..1....1..1..0..0....0..1..0..0....0..0..1..1....0..1..0..0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|