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A146571
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0100-0100-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 19, 33, 697, 1417, 19803, 53699, 1477697, 4737663, 455317519, 1851757293, 336261923485, 1713147308441, 437901036631927, 2765297617197395, 1334447979633012957, 10411206726127074327
(list; graph; refs; listen; history; internal format)
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