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A146864
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1101-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 9, 13, 33, 41, 1409, 3235, 90107, 256175, 6239335, 21132187, 2159343451, 9249857635, 1354374350659, 7148183873103, 1813815982643009, 11749437543357083, 7025171720330773661, 56366719637660576905
(list; graph; refs; listen; history; internal format)
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