Primes that are a concatenation of a prime and its first digit.

Terms

a(0) =131a(1) =191a(2) =313a(3) =373a(4) =797a(5) =1031a(6) =1091a(7) =1511a(8) =1571a(9) =1811a(10) =1931a(11) =3313a(12) =3373a(13) =3533a(14) =3593a(15) =3673a(16) =3733a(17) =3793a(18) =3833a(19) =7517a(20) =7577a(21) =7877a(22) =9199a(23) =9419a(24) =9479a(25) =9539a(26) =9679a(27) =9719a(28) =9839a(29) =10091