|
| |
|
|
A145969
|
|
Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a one by five or five by one block.
|
|
0
| |
|
|
1, 1, 1, 1, 1, 1, 2, 1, 3, 1, 6, 1, 15, 3, 43, 8, 140, 27, 656, 89, 3196, 333, 18641, 1310, 125685, 7293, 1010276, 48975, 9527791, 401989
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,7
|
|
|
EXAMPLE
| Maximal 9 X 9 example
.0.0.0.0.0.0.0.0.0
.0.0.1.1.1.1.1.0.0
.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
.0.1.0.0.0.0.0.1.0
.0.1.0.0.0.0.0.1.0
.0.0.1.1.1.1.1.0.0
.0.0.0.0.0.0.0.0.0
|
|
|
CROSSREFS
| Sequence in context: A084419 A119606 A034850 * A140352 A082588 A034869
Adjacent sequences: A145966 A145967 A145968 * A145970 A145971 A145972
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| R. H. Hardin (rhhardin(AT)att.net), Oct 25 2008
|
| |
|
|
