Numbers k such that (26*10^k + 49)/3 is prime.

Terms

a(0) =1a(1) =2a(2) =5a(3) =6a(4) =18a(5) =25a(6) =34a(7) =67a(8) =73a(9) =98a(10) =287a(11) =380a(12) =544a(13) =748a(14) =911a(15) =947a(16) =978a(17) =2480a(18) =3017a(19) =7951a(20) =13081a(21) =17665a(22) =17798a(23) =34857a(24) =43960a(25) =100566