%N Numbers k in A002313 such that the count of primitive roots of k (A084168) are also in sequence A002313, where A002313 is the list of primes p having a unique representation as the sum of two squares, p = x^2 + y^2.
%e 449 = 20^2 + 7^2 has 192 primitive roots, of which 41 are prime, of which 20 are in A002313.
%Y Cf. A002313, A084168.
%A _Sven Simon_, May 17 2003
%E Offset changed to 1 by _Jinyuan Wang_, Mar 09 2020
%E Name edited by _Michel Marcus_, Mar 09 2020