Primes p whose period of reciprocal equals (p-1)/13.

Terms

a(0) =2393a(1) =15497a(2) =18149a(3) =18617a(4) =20021a(5) =25819a(6) =26183a(7) =26339a(8) =29303a(9) =39937a(10) =42953a(11) =48491a(12) =52313a(13) =53327a(14) =57331a(15) =58189a(16) =59021a(17) =65183a(18) =81953a(19) =82499a(20) =87491a(21) =91703a(22) =98047a(23) =102233a(24) =104287a(25) =109097a(26) =111229a(27) =119419a(28) =129793a(29) =131171