Primes p whose reciprocal has period (p-1)/10.

Terms

a(0) =281a(1) =521a(2) =1031a(3) =1951a(4) =2281a(5) =2311a(6) =2591a(7) =3671a(8) =5471a(9) =5711a(10) =6791a(11) =7481a(12) =8111a(13) =8681a(14) =8761a(15) =9281a(16) =9551a(17) =10601a(18) =11321a(19) =12401a(20) =13151a(21) =13591a(22) =14831a(23) =14951a(24) =15671a(25) =16111a(26) =16361a(27) =18671a(28) =21191a(29) =21521