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A144260
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Number of symmetric n X n binary matrices with each element equal to one minus the sum of its horizontal and vertical neighbors, modulo two.
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1
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1, 1, 1, 4, 2, 1, 1, 1, 16, 1, 8, 1, 1, 4, 1, 16, 2, 1, 256, 1, 1, 1, 128, 4, 1, 1, 1, 1
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