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A025486
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Least k with A025485(k) = n.
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0
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0, 3, 5, 10, 26, 170, 7226, 13053770, 42600227803226, 453694852221687377444001770, 51459754733114686962148583993443846186613037940783226
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OFFSET
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0,2
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LINKS
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FORMULA
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For n >= 4, a(n) = a(n-1)^2/4+1.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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Title corrected and missing a(1)=3 inserted by Sean A. Irvine, Aug 31 2019
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STATUS
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approved
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