Initial terms of '4-block' primes as described in A032591.

Terms

a(0) =11a(1) =101a(2) =191a(3) =211a(4) =461a(5) =821a(6) =1301a(7) =1481a(8) =1871a(9) =2081a(10) =3251a(11) =3331a(12) =3461a(13) =5501a(14) =5651a(15) =7741a(16) =9431a(17) =11731a(18) =13001a(19) =13691a(20) =15401a(21) =15641a(22) =15731a(23) =16061a(24) =16141a(25) =17191a(26) =18041a(27) =18251a(28) =18911a(29) =19421