Numbers n such that 2*10^n + 3 is prime.

Terms

a(0) =0a(1) =1a(2) =3a(3) =5a(4) =6a(5) =7a(6) =12a(7) =16a(8) =17a(9) =22a(10) =24a(11) =35a(12) =115a(13) =120a(14) =358a(15) =1488a(16) =1819a(17) =4679a(18) =9821a(19) =27217a(20) =27693a(21) =194413