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A146137
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 5-point barb 1,1 1,2 2,2 2,3 3,2 in any orientation.
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0
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1, 1, 1, 1, 1, 1, 149, 307, 3283, 9637, 237685, 792401, 149008323, 690862749, 219427051049, 1350088886833, 717485827831517, 5812692511149509, 9087725403509413361, 98388300257852844757, 382960435361198474272451
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OFFSET
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1,7
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LINKS
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EXAMPLE
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Maximal 8 X 8 example
.0.1.0.0.0.0.1.0
.1.1.1.0.0.1.1.1
.0.0.1.0.0.1.0.0
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.1.0.0.0.0.0.0.1
.1.1.1.0.0.1.1.1
.0.1.0.0.0.0.1.0
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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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