Numbers k such that 23*10^(k + 2) + 57 is prime.

Terms

a(0) =0a(1) =1a(2) =3a(3) =8a(4) =21a(5) =32a(6) =33a(7) =48a(8) =68a(9) =295a(10) =296a(11) =298a(12) =1081a(13) =1753a(14) =1963a(15) =4336a(16) =5008a(17) =5608a(18) =14240