Primes that can be formed by concatenating 2^a and 3^b.

Terms

a(0) =11a(1) =13a(2) =19a(3) =23a(4) =29a(5) =41a(6) =43a(7) =83a(8) =89a(9) =127a(10) =163a(11) =181a(12) =227a(13) =281a(14) =641a(15) =643a(16) =827a(17) =881a(18) =1283a(19) =1289a(20) =1627a(21) =2243a(22) =2729a(23) =4243a(24) =4729a(25) =6427a(26) =6481a(27) =8243a(28) =10243a(29) =16561