|
Search: id:A147028
|
|
|
| A147028 |
|
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0100-0100-1111-0010 pattern in any orientation. |
|
+0
1
|
|
| 1, 1, 1, 1, 1, 1, 1, 1, 177, 345, 2505, 5729, 75825, 187849, 6215801, 19558129, 3054260057, 12287993577, 1988214768097, 9763619895845, 2194779047865427, 13072631855408245
(list; graph; listen)
|
|
|
OFFSET
|
1,9
|
|
|
EXAMPLE
|
Maximal 9 X 9 example
.0.1.0.0.0.0.0.1.0
.1.1.1.1.0.1.1.1.1
.0.0.1.0.0.0.1.0.0
.0.0.1.0.0.0.1.0.0
.0.0.0.0.0.0.0.0.0
.0.0.1.0.0.0.1.0.0
.0.0.1.0.0.0.1.0.0
.1.1.1.1.0.1.1.1.1
.0.1.0.0.0.0.0.1.0
|
|
CROSSREFS
|
Adjacent sequences: A147025 A147026 A147027 this_sequence A147029 A147030 A147031
Sequence in context: A046189 A164843 A077786 this_sequence A105988 A083620 A097317
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Ron Hardin (rhhardin(AT)att.net), Nov 04 2008
|
|
|
Search completed in 0.002 seconds
|
