|
Search: id:A147228
|
|
|
| A147228 |
|
Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 11011-01110 pattern in any orientation. |
|
+0
1
|
|
| 1, 1, 1, 1, 1, 1, 2, 1, 4, 1, 6, 1, 14, 3, 43, 10, 138, 29, 612, 94, 3177, 321, 17102, 1262, 109974, 7231, 884546, 51504
(list; graph; listen)
|
|
|
OFFSET
|
1,7
|
|
|
EXAMPLE
|
Maximal 9 X 9 example
.0.0.0.0.0.0.0.0.0
.0.0.1.1.0.1.1.0.0
.0.1.0.1.1.1.0.1.0
.0.1.1.0.0.0.1.1.0
.0.0.1.0.0.0.1.0.0
.0.1.1.0.0.0.1.1.0
.0.1.0.1.1.1.0.1.0
.0.0.1.1.0.1.1.0.0
.0.0.0.0.0.0.0.0.0
|
|
CROSSREFS
|
Sequence in context: A147008 A147365 A147064 this_sequence A074643 A060794 A074919
Adjacent sequences: A147225 A147226 A147227 this_sequence A147229 A147230 A147231
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Ron Hardin (rhhardin(AT)att.net), Nov 04 2008
|
|
|
Search completed in 0.002 seconds
|
