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A054513
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Log_b 10 where b is smallest primitive root (A001918) mod n-th prime.
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10
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5, 10, 3, 17, 3, 23, 14, 24, 8, 10, 19, 48, 7, 23, 16, 34, 9, 66, 28, 86, 35, 25, 45, 48, 25, 95, 33, 47, 85, 87, 105, 32, 142, 16, 41, 40, 139, 157, 94, 35, 90, 46, 133, 47, 12, 119, 5, 204, 88, 115, 103, 191, 209, 54, 148, 110, 110, 174, 94, 218, 1, 244, 27, 1, 278, 315
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OFFSET
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5,1
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REFERENCES
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Tom M. Apostol, Introduction to Analytic Number Theory, Springer-Verlag, 1976, Table 10.2, pp. 216-217.
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LINKS
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MATHEMATICA
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a[n_] := Module[{p, b, lg = 1}, b = PrimitiveRoot[p = Prime[n]]; While[ PowerMod[b, lg, p] != 10, lg++]; lg]; Array[a, 100, 5] (* Jean-François Alcover, Sep 03 2016 *)
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PROG
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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