Numbers k such that (266*10^k + 1)/3 is prime.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =6a(7) =8a(8) =10a(9) =13a(10) =19a(11) =26a(12) =37a(13) =69a(14) =77a(15) =81a(16) =214a(17) =242a(18) =255a(19) =900a(20) =1113a(21) =1833a(22) =3166a(23) =3566a(24) =4753a(25) =4849a(26) =4869a(27) =5005a(28) =7372a(29) =7702