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A147328
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 00100-00100-11111-00100 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 3, 9, 20, 47, 148, 487, 2258, 13693, 84456
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.1.0
.0.0.0.0.0.0.1.0
.0.0.0.0.1.1.1.1
.0.0.0.1.0.0.1.0
.0.0.0.1.0.0.1.0
.0.1.1.1.1.1.0.0
.0.0.0.1.0.0.0.0
CROSSREFS
Sequence in context: A073801 A065891 A321173 * A364914 A220770 A191527
KEYWORD
nonn
AUTHOR
STATUS
approved