a(n) is the least index such that the least primitive root of the a(n)-th prime is n, or zero if no such prime exists.

A066529

a(n) is the least index such that the least primitive root of the a(n)-th prime is n, or zero if no such prime exists.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =0a(4) =9a(5) =13a(6) =20a(7) =0a(8) =0a(9) =65a(10) =117a(11) =566a(12) =88a(13) =173a(14) =85a(15) =0a(16) =64a(17) =5426a(18) =43a(19) =10217a(20) =80a(21) =474a(22) =326a(23) =44110a(24) =0a(25) =1479a(26) =0a(27) =12443a(28) =1842a(29) =11662

External references