Bases in which 13 is a unique-period prime.

Terms

a(0) =2a(1) =3a(2) =4a(3) =5a(4) =12a(5) =14a(6) =22a(7) =23a(8) =25a(9) =51a(10) =103a(11) =168a(12) =170a(13) =207a(14) =239a(15) =337a(16) =415a(17) =675a(18) =831a(19) =1351a(20) =1663a(21) =2196a(22) =2198a(23) =2703a(24) =3327a(25) =4393a(26) =5407a(27) =6655a(28) =8787a(29) =10815