|
|
A147087
|
|
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 10001-11111 pattern in any orientation.
|
|
0
|
|
|
1, 1, 1, 1, 1, 1, 1, 1, 3, 5, 9, 15, 27, 43, 124, 355, 1029, 2971, 10017, 31249, 124044, 490643, 2352059, 10915093, 60936189, 323565841, 2097402227
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,9
|
|
LINKS
|
|
|
EXAMPLE
|
Maximal 9 X 9 example
.0.0.1.0.0.0.1.0.0
.0.0.1.1.1.1.1.0.0
.1.1.0.0.0.0.0.1.1
.0.1.0.0.0.0.0.1.0
.0.1.0.0.0.0.0.1.0
.0.1.0.0.0.0.0.1.0
.1.1.0.0.0.0.0.1.1
.0.0.1.1.1.1.1.0.0
.0.0.1.0.0.0.1.0.0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|