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A147081
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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 10000-11111-10000 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 5, 11, 23, 38, 81, 220, 567, 1681, 5209, 18445, 63999, 259065, 1109285, 5269124, 26433601, 148185912, 862407722
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