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A146627
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1010-1111-0010 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 17, 21, 573, 1143, 12133, 30945, 812099, 2463251, 205843047, 793610117, 114751333899, 550658503225, 126710497064071, 751070142241727, 321642812339840537, 2354725099172800861
(list; graph; refs; listen; history; internal format)
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