|
|
A146378
|
|
Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 0100-1111-0100 pattern in any orientation.
|
|
0
|
|
|
1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 5, 1, 16, 5, 66, 13, 195, 31, 1006, 121, 6245, 491, 48466, 3357, 493217, 25639, 5217946, 206564, 68677904, 2153667
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,9
|
|
LINKS
|
|
|
EXAMPLE
|
Maximal 9 X 9 example
.0.0.0.0.1.0.0.0.0
.0.0.0.0.1.0.0.0.0
.0.0.0.1.1.1.0.0.0
.0.0.1.0.1.0.1.0.0
.1.1.1.1.0.1.1.1.1
.0.0.1.0.1.0.1.0.0
.0.0.0.1.1.1.0.0.0
.0.0.0.0.1.0.0.0.0
.0.0.0.0.1.0.0.0.0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|