Numbers k such that (19*10^k + 77) / 3 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =6a(5) =17a(6) =22a(7) =56a(8) =71a(9) =90a(10) =93a(11) =109a(12) =124a(13) =135a(14) =179a(15) =255a(16) =1804a(17) =2541a(18) =2707a(19) =3195a(20) =4952a(21) =5884a(22) =9301a(23) =19847a(24) =27903a(25) =45739a(26) =65545a(27) =69424a(28) =103907a(29) =160619