A279398 - OEIS

A279398

a(n) is the smallest prime primitive root modulo A193305(n).

3, 5, 2, 3, 3, 5, 7, 2, 7, 2, 3, 3, 5, 3, 3, 5, 3, 3, 5, 2, 7, 3, 5, 3, 3, 11, 2, 7, 2, 7, 7, 5, 3, 2, 5, 2, 3, 5, 3, 5, 5, 11, 3, 7, 2, 3, 3, 17, 3, 3, 3, 3, 7, 5, 3, 5, 7, 3

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OFFSET

1,1

COMMENTS

Values taken from A103309 (Robert Israel).

If there should be no prime primitive root for A193305(n) then a(n) = 0.

LINKS

Table of n, a(n) for n=1..58.

EXAMPLE

n = 1: 2^k (mod 4) is never 1 for k >=1. 3^1 = 3, 3^2 = 3^phi(4) = 9 == 1 (mod 4).

CROSSREFS

Cf. A103309, A193305.

Sequence in context: A076562 A306220 A057673 * A241429 A200109 A156060

Adjacent sequences: A279395 A279396 A279397 * A279399 A279400 A279401

KEYWORD

nonn

AUTHOR

Wolfdieter Lang, Jan 18 2017

STATUS

approved