A054508 Log_b 5 where b is smallest primitive root (A001918) mod n-th prime.

5, 4, 9, 5, 16, 1, 22, 20, 23, 22, 25, 1, 47, 6, 22, 15, 28, 1, 62, 27, 70, 1, 24, 1, 47, 76, 83, 87, 46, 75, 86, 104, 112, 1, 15, 1, 39, 138, 156, 50, 1, 89, 138, 132, 89, 11, 98, 165, 138, 138, 130, 55, 1, 208, 170, 1, 186, 233, 173, 1, 196, 39, 243, 236, 33, 277, 314

Offset

4,1

References

Tom M. Apostol, Introduction to Analytic Number Theory, Springer-Verlag, 1976, Table 10.2, pp. 216-217.

Links

Amiram Eldar, Table of n, a(n) for n = 4..10000

Mathematica

a[n_] := Module[{p, b, lg = 1}, b = PrimitiveRoot[p = Prime[n]]; While[ PowerMod[b, lg, p] != 5, lg++]; lg]; Array[a, 100, 4] (* Jean-François Alcover, Sep 03 2016 *)

Crossrefs

Cf. table in A054503.

Cf. A001918, A054505, A054506, A054507, A054509, A054510, A054511, A054512, A054513.

Sequence in context: A057763 A198609 A332794 * A359092 A110617 A371859

Adjacent sequences: A054505 A054506 A054507 * A054509 A054510 A054511

Keyword

nonn,easy

Author

N. J. A. Sloane, Apr 09 2000

Extensions

More terms from James A. Sellers, Apr 09 2000

Status

approved