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A146189
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 101-111-100 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 117, 259, 2279, 5789, 60955, 163861, 9576387, 34012697, 10076483081, 49427387999, 9949697912705, 60225158985931, 15793067759502057, 116501021735138203, 110213762112932651169, 1030724751585178353123
(list; graph; refs; listen; history; internal format)
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