Palindromic prime units W appearing twice in first-order fractal palindromic primes WmW.

Terms

a(0) =3a(1) =7a(2) =11a(3) =131a(4) =151a(5) =191a(6) =919a(7) =10301a(8) =10501a(9) =10601a(10) =12421a(11) =12721a(12) =13331a(13) =13831a(14) =13931a(15) =14341a(16) =15551a(17) =16061a(18) =16361a(19) =16561a(20) =17471a(21) =18481a(22) =19391a(23) =30203a(24) =30403a(25) =30703a(26) =31513a(27) =32323a(28) =32423a(29) =33533