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A058258
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The 2-Up sequence: formed from final entries in rows of A058257.
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2
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1, 1, 1, 1, 3, 6, 26, 71, 413, 1456, 10576, 45541, 397023, 2020656, 20551376, 120686411, 1402815833, 9336345856, 122087570176, 908138776681, 13194844482843, 108480272749056, 1733786041150976, 15611712012050351
(list; graph; refs; listen; history; internal format)
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