|
|
A146286
|
|
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 111-110-111 pattern in any orientation.
|
|
0
|
|
|
1, 1, 1, 1, 1, 1, 5, 13, 29, 41, 99, 219, 653, 1719, 7125, 30115, 144385, 515791, 2502679, 10851481, 66672841, 362202203, 2693814149, 19415112859, 179313023913, 1385523385051
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,7
|
|
LINKS
|
|
|
EXAMPLE
|
Maximal 8 X 8 example
.0.0.0.0.1.1.1.0
.1.0.1.0.1.1.0.0
.1.1.1.0.1.1.1.0
.1.1.1.0.0.0.0.0
.0.0.0.0.0.1.1.1
.0.1.1.1.0.1.1.1
.0.0.1.1.0.1.0.1
.0.1.1.1.0.0.0.0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|