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A147377
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 10000-11100-00111-00001 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 11, 15, 241, 427, 4185, 8653, 87751, 203323, 3730869, 9866343, 357089469, 1093277721, 68995024703, 247016437881, 25144161711781, 105091314370945
(list; graph; refs; listen; history; internal format)
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