|
Search: id:A145966
|
|
|
| A145966 |
|
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a one by five or five by one block. |
|
+0
1
|
|
| 1, 1, 1, 1, 9, 1, 16, 1, 49, 1, 384, 25, 3677, 173, 58365, 1794, 1326578, 20685, 34318014, 319727, 1264197446, 6676539, 64169954075, 232552310
(list; graph; listen)
|
|
|
OFFSET
|
1,5
|
|
|
EXAMPLE
|
Maximal 9 X 9 example
.0.0.1.1.1.1.1.0.0
.0.0.0.0.0.0.0.0.0
.1.0.1.0.1.0.1.0.1
.1.0.1.0.1.0.1.0.1
.1.0.1.0.1.0.1.0.1
.1.0.1.0.1.0.1.0.1
.1.0.1.0.1.0.1.0.1
.0.0.0.0.0.0.0.0.0
.0.0.1.1.1.1.1.0.0
|
|
CROSSREFS
|
Sequence in context: A062357 A061215 A072448 this_sequence A014721 A054018 A010170
Adjacent sequences: A145963 A145964 A145965 this_sequence A145967 A145968 A145969
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Ron Hardin (rhhardin(AT)att.net), Oct 25 2008
|
|
|
Search completed in 0.002 seconds
|
