Numbers k such that (2*10^k + 49)/3 is prime.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =5a(5) =6a(6) =7a(7) =8a(8) =13a(9) =21a(10) =22a(11) =25a(12) =26a(13) =38a(14) =200a(15) =395a(16) =442a(17) =561a(18) =908a(19) =1295a(20) =5541a(21) =7795a(22) =8600a(23) =19157a(24) =22536a(25) =45636