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A147370
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0111-1100-0111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 14, 9, 82, 25, 666, 57, 4092, 377, 52105, 5329, 1098160, 73458, 31100564, 886631, 940187683, 17314150, 39465005389, 625360491
(list; graph; refs; listen; history; internal format)
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