Numbers k such that (2*10^k - 59)/3 is prime.

Terms

a(0) =2a(1) =3a(2) =6a(3) =9a(4) =10a(5) =14a(6) =15a(7) =34a(8) =56a(9) =138a(10) =250a(11) =350a(12) =357a(13) =374a(14) =392a(15) =1594a(16) =4794a(17) =5290a(18) =6702a(19) =11936a(20) =22296a(21) =55762a(22) =55834a(23) =96195