Primes of the form p==3 (mod 4) such that the average of their primitive roots equals p/2.

Terms

a(0) =19a(1) =307a(2) =1451a(3) =2179a(4) =2251a(5) =2683a(6) =2843a(7) =3259a(8) =3907a(9) =4447a(10) =11863a(11) =12907a(12) =17623a(13) =30763a(14) =37963a(15) =51059a(16) =52543a(17) =86131a(18) =92467a(19) =104851a(20) =129763a(21) =131203a(22) =146683a(23) =150151a(24) =156151a(25) =156703a(26) =162523a(27) =163819a(28) =174007a(29) =245899