|
|
A147253
|
|
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 11100-00100-00111 pattern in any orientation.
|
|
0
|
|
|
1, 1, 1, 1, 1, 1, 1, 1, 11, 17, 41, 57, 231, 453, 1543, 3457, 18427, 50015, 289401, 862907, 5771143, 20904685, 158696163, 662519097
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,9
|
|
LINKS
|
|
|
EXAMPLE
|
Maximal 9 X 9 example
.0.0.0.0.0.1.1.1.0
.1.0.0.0.0.1.0.0.0
.1.0.0.1.1.1.0.0.0
.1.1.1.0.0.0.1.0.0
.0.0.1.0.0.0.1.0.0
.0.0.1.0.0.0.1.1.1
.0.0.0.1.1.1.0.0.1
.0.0.0.1.0.0.0.0.1
.0.1.1.1.0.0.0.0.0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|