Primes formed by an m-digit prime concatenated with its last (m-1) digits, for m > 1.

Terms

a(0) =199a(1) =233a(2) =311a(3) =433a(4) =599a(5) =677a(6) =733a(7) =977a(8) =10303a(9) =10909a(10) =16363a(11) =18181a(12) =22727a(13) =23333a(14) =28181a(15) =30707a(16) =34747a(17) =34949a(18) =35353a(19) =36767a(20) =45757a(21) =48787a(22) =49999a(23) =50909a(24) =52121a(25) =58787a(26) =59393a(27) =59999a(28) =60101a(29) =61717