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A146225
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 9, 13, 39, 69, 2575, 6405, 191203, 599559, 31751065, 124920743, 19072164165, 96207487051, 23729375699967, 150729249130871, 86943333060607105, 701895334984042253, 791712727158897187729
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OFFSET
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1,5
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LINKS
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EXAMPLE
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Maximal 8 X 8 example
.1.1.0.0.0.0.1.1
.1.1.0.0.0.0.1.1
.1.0.0.0.0.0.0.1
.1.0.0.0.0.0.0.1
.0.0.1.0.0.1.0.0
.0.0.1.0.0.1.0.0
.0.1.1.0.0.1.1.0
.0.1.1.0.0.1.1.0
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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