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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, 9, 1, 16, 1, 49, 1, 384, 25, 3677, 173, 58365, 1794, 1326578, 20685, 34318014, 319727, 1264197446, 6676539, 64169954075, 232552310
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: A348974 A061215 A072448 * A349143 A014721 A054018
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 25 2008
STATUS
approved