

A113771


Largest gap between primitive roots of nth prime.


0



2, 3, 4, 5, 5, 4, 6, 7, 7, 5, 10, 8, 12, 12, 7, 4, 6, 8, 8, 9, 10, 21, 8, 6, 15, 8, 14, 7, 12, 7, 12, 10, 7, 12, 5, 15, 10, 11, 7, 7, 7, 13, 21, 11, 8, 14, 15, 12, 8, 13, 7, 11, 17, 9, 7, 8, 9, 15, 13, 16, 10, 10, 12, 19, 20, 6, 22, 20, 9, 12, 7, 9, 15, 9, 18, 9, 9, 19, 13, 42, 10, 17, 12, 10
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OFFSET

1,1


REFERENCES

R. Osborn, Tables of All Primitive Roots of Odd Primes Less Than 1000, Univ. Texas Press, 1961.


LINKS

Table of n, a(n) for n=1..84.
Eric Weisstein's World of Mathematics, Primitive Root.


EXAMPLE

For n=6, p_6=13, the primitive roots are 2,6,7,11, with largest gap 117=4. For n=5, p_5=11, the primitive roots are 2,6,7,8, with largest gap 28=5 (mod 11).


CROSSREFS

Cf. A060749 (table), A001918 (least).
Sequence in context: A101916 A100771 A234470 * A131845 A062186 A085763
Adjacent sequences: A113768 A113769 A113770 * A113772 A113773 A113774


KEYWORD

easy,nonn


AUTHOR

Franklin T. AdamsWatters, Jan 19 2006


STATUS

approved



