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A147437
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1010-1111-1010 pattern in any orientation.
0
1, 1, 1, 1, 5, 1, 19, 11, 496, 277, 13622, 3725, 625566, 100329, 46290886, 7689337
OFFSET
1,5
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.1.0.0.0.0.1.0
.1.1.1.0.0.1.1.1
.0.1.0.0.0.0.1.0
.1.1.1.0.0.1.1.1
CROSSREFS
Sequence in context: A193857 A146055 A286232 * A147369 A377879 A375363
KEYWORD
nonn
AUTHOR
STATUS
approved