Numbers k such that (19*10^k + 101) / 3 is prime.

Terms

a(0) =1a(1) =3a(2) =4a(3) =9a(4) =10a(5) =12a(6) =13a(7) =16a(8) =20a(9) =37a(10) =57a(11) =66a(12) =106a(13) =116a(14) =127a(15) =355a(16) =396a(17) =547a(18) =2289a(19) =3777a(20) =4500a(21) =7821a(22) =15663a(23) =22746a(24) =25978a(25) =30434a(26) =39682a(27) =119716a(28) =133390a(29) =145093