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 A082815 Consider primes p with a unique representation p = x^2 + y^2, where x is least primitive root of p. a(n) is the first such prime with x increasing in the sequence, x can be found in A082816. 2

%I

%S 2,5,3061,398261,2387221,8935021,514613581

%N Consider primes p with a unique representation p = x^2 + y^2, where x is least primitive root of p. a(n) is the first such prime with x increasing in the sequence, x can be found in A082816.

%C A082842 includes all numbers having primitive roots.

%e 398261 = 10^2 + 631^2 and 10 is least primitive root of 398261.

%Y Cf. A001481, A002313, A082816, A082842.

%K nonn,more

%O 1,1

%A _Sven Simon_, May 24 2003

%E Offset 1 from _Michel Marcus_, Oct 31 2018

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Last modified February 20 22:51 EST 2019. Contains 320362 sequences. (Running on oeis4.)