|
|
A147151
|
|
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1000-1100-0111-0010 pattern in any orientation.
|
|
0
|
|
|
1, 1, 1, 1, 1, 1, 1, 1, 5, 13, 25, 61, 195, 561, 1503, 6349, 34075, 171101, 895779, 5615365, 39425317, 281937999
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,9
|
|
LINKS
|
|
|
EXAMPLE
|
Maximal 9 X 9 example
.0.0.0.0.0.0.1.0.0
.0.0.0.0.0.1.1.0.0
.0.0.0.1.1.1.0.1.1
.0.0.1.0.1.0.1.1.0
.0.0.1.1.0.1.1.0.0
.0.1.1.0.1.0.1.0.0
.1.1.0.1.1.1.0.0.0
.0.0.1.1.0.0.0.0.0
.0.0.1.0.0.0.0.0.0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|