Numbers k such that (4*10^k + 83)/3 is prime.

Terms

a(0) =0a(1) =1a(2) =3a(3) =7a(4) =9a(5) =15a(6) =17a(7) =27a(8) =37a(9) =55a(10) =58a(11) =155a(12) =228a(13) =480a(14) =720a(15) =1305a(16) =1573a(17) =2173a(18) =2547a(19) =2767a(20) =5448a(21) =5500a(22) =9468a(23) =14268a(24) =35207a(25) =58155a(26) =102612a(27) =114340a(28) =124420a(29) =169559