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A146699
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-1111-0010 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 17, 21, 585, 1175, 13235, 33591, 904833, 2777683, 243371641, 949834779, 144264575111, 703897326167, 173395824962595, 1047822171303933, 492478720057422059, 3690926761734236233
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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
.0.0.0.0.0.0.0.0
.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
.0.1.1.0.0.1.1.0
.1.1.0.0.0.0.1.1
.1.1.0.0.0.0.1.1
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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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