|
|
A147404
|
|
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1110-0111-0001 pattern in any orientation.
|
|
0
|
|
|
1, 1, 1, 5, 1, 9, 13, 53, 137, 741, 2493, 19441, 73321, 1016967, 4911015, 87040405, 643897713
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,4
|
|
LINKS
|
|
|
EXAMPLE
|
Maximal 8 X 8 example
.1.1.0.0.1.1.0.0
.0.1.1.0.0.1.1.0
.0.1.1.0.0.1.1.0
.0.0.1.1.0.0.1.1
.1.1.0.0.1.1.0.0
.0.1.1.0.0.1.1.0
.0.1.1.0.0.1.1.0
.0.0.1.1.0.0.1.1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|