Numbers k such that (202*10^k - 13)/9 is prime.

Terms

a(0) =1a(1) =2a(2) =4a(3) =20a(4) =22a(5) =34a(6) =35a(7) =41a(8) =185a(9) =547a(10) =644a(11) =713a(12) =1489a(13) =1885a(14) =3211a(15) =3257a(16) =3625a(17) =6733a(18) =47732a(19) =165569a(20) =172940a(21) =195383