Positive integers k such that 13^k == 9 (mod k).

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =10a(5) =172a(6) =296a(7) =332a(8) =410a(9) =872a(10) =1048a(11) =1070a(12) =1544a(13) =2830a(14) =3470a(15) =7486a(16) =9196a(17) =22184a(18) =90892a(19) =121174a(20) =299816a(21) =575206a(22) =885112a(23) =1329388a(24) =1386430a(25) =2518994a(26) =4167272a(27) =5600212a(28) =8475016a(29) =9180370