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A146935
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1111-1111 pattern in any orientation.
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0
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1, 1, 1, 3, 1, 5, 1, 10, 7, 62, 25, 420, 89, 3595, 559, 35290, 4332, 459986, 47525, 9058999, 720844, 232457113, 13515353, 7854920994, 345530332, 353173272787, 11945906159, 21075055556569, 546900316419
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OFFSET
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1,4
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LINKS
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EXAMPLE
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Maximal 8 X 8 example
.0.0.1.1.1.1.0.0
.0.0.1.1.1.1.0.0
.1.1.0.0.0.0.1.1
.1.1.0.0.0.0.1.1
.1.1.0.0.0.0.1.1
.1.1.0.0.0.0.1.1
.0.0.1.1.1.1.0.0
.0.0.1.1.1.1.0.0
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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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