|
| |
|
|
A146875
|
|
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1110-0100-0111 pattern in any orientation.
|
|
0
| |
|
|
1, 1, 1, 1, 1, 1, 1, 1, 5, 13, 25, 41, 109, 333, 897, 2841, 13365, 66133, 320121, 1501457, 8213389, 51555309
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,9
|
|
|
EXAMPLE
| Maximal 9 X 9 example
.0.0.0.0.1.1.1.0.0
.0.0.0.0.0.1.0.0.0
.0.0.0.1.1.1.0.0.1
.0.0.1.0.0.0.1.1.1
.1.0.1.0.0.0.1.0.1
.1.1.1.0.0.0.1.0.0
.1.0.0.1.1.1.0.0.0
.0.0.0.1.0.0.0.0.0
.0.0.1.1.1.0.0.0.0
|
|
|
CROSSREFS
| Sequence in context: A146590 A098483 A147205 * A064276 A102724 A147031
Adjacent sequences: A146872 A146873 A146874 * A146876 A146877 A146878
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| R. H. Hardin (rhhardin(AT)att.net), Nov 04 2008
|
| |
|
|
