Integers k such that the concatenation of 2^k and 3^k is prime.

Terms

a(0) =0a(1) =1a(2) =3a(3) =7a(4) =8a(5) =21a(6) =23a(7) =33a(8) =51a(9) =88a(10) =96a(11) =227a(12) =287a(13) =1231a(14) =1924a(15) =3035a(16) =3614a(17) =4598a(18) =6112a(19) =10813