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A146245
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Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 110-111-010 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 3, 3, 5, 5, 11, 11, 29, 29, 171, 171, 783, 783, 4399, 4399, 33371, 33371, 348951, 348951, 4490023, 4490023, 67743969, 67743969, 1262306965, 1262306965
(list; graph; refs; listen; history; internal format)
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