Numbers k such that (7*10^k + 143)/3 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =7a(5) =10a(6) =11a(7) =25a(8) =26a(9) =32a(10) =122a(11) =123a(12) =126a(13) =161a(14) =292a(15) =320a(16) =743a(17) =1630a(18) =2738a(19) =3178a(20) =4814a(21) =4833a(22) =5030a(23) =7035a(24) =8151a(25) =12554a(26) =13954a(27) =15113a(28) =80490a(29) =96112