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A067646
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Number of prime alternating tangles (or knots) with two connected components.
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2
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1, 2, 4, 8, 24, 72, 264, 1074, 4490, 20296, 92768, 439148, 2118654, 10377708, 51740280, 260545092, 1328891356, 6836872181
(list; graph; refs; listen; history; internal format)
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