|
| |
|
|
A147199
|
|
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-0100-0111-0001 pattern in any orientation.
|
|
0
| |
|
|
1, 1, 1, 1, 1, 1, 1, 1, 9, 25, 37, 77, 207, 663, 1517, 4967, 16733, 80643, 308521, 1536069, 6622503, 39983439, 198749745, 1357116341
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,9
|
|
|
EXAMPLE
| Maximal 9 X 9 example
.0.0.0.1.0.1.0.0.0
.0.1.1.1.0.1.1.1.0
.0.1.0.0.0.0.0.1.0
.1.1.0.0.0.0.0.1.1
.0.0.0.0.0.0.0.0.0
.1.1.0.0.0.0.0.1.1
.0.1.0.0.0.0.0.1.0
.0.1.1.1.0.1.1.1.0
.0.0.0.1.0.1.0.0.0
|
|
|
CROSSREFS
| Sequence in context: A090333 A137190 A044070 * A147403 A044451 A114057
Adjacent sequences: A147196 A147197 A147198 * A147200 A147201 A147202
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| R. H. Hardin (rhhardin(AT)att.net), Nov 04 2008
|
| |
|
|
