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A146182
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 110-111-100 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 9, 9, 33, 33, 113, 113, 1711, 1711, 59971, 59971, 1694043, 1694043, 74822217, 74822217, 7821008273, 7821008273, 1319866139817, 1319866139817
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.0.1.0.0.0.0.1.0
.1.1.0.0.0.0.1.1
.1.1.1.0.0.1.1.1
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.1.1.1.0.0.1.1.1
.1.1.0.0.0.0.1.1
.0.1.0.0.0.0.1.0
CROSSREFS
Sequence in context: A147117 A147263 A146234 * A147149 A147277 A146138
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 27 2008
STATUS
approved