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A147366
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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 01110-11111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 4, 7, 18, 27, 60, 127, 520, 1313, 5577, 14738, 65753, 214371, 1292619, 5259696, 36901354, 169889413, 1338225681, 7299428688
(list; graph; refs; listen; history; internal format)
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