Numbers k such that (13*10^k + 47) / 3 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =9a(4) =10a(5) =14a(6) =36a(7) =44a(8) =69a(9) =124a(10) =249a(11) =297a(12) =453a(13) =535a(14) =766a(15) =1074a(16) =1668a(17) =1975a(18) =1987a(19) =2295a(20) =5703a(21) =6526a(22) =13329a(23) =34738a(24) =37549a(25) =39825a(26) =93236a(27) =99508a(28) =136687