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A145811
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1/2 of the number of islands of ones fitting in an n X n array symmetric under horizontal and vertical reflection with all ones connected only either three adjacent vertically or three adjacent horizontally.
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0
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0, 0, 1, 0, 2, 0, 4, 4, 7, 4, 9, 8, 13, 12, 19, 16, 22, 20, 29, 28, 37, 30
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