Least positive k such that 10^n + {k, k+2, k+6, k+8} are all prime.

Terms

a(0) =4a(1) =1a(2) =1a(3) =481a(4) =3001a(5) =1111a(6) =2341a(7) =13951a(8) =5461a(9) =25261a(10) =57421a(11) =7531a(12) =123691a(13) =56581a(14) =945721a(15) =67441a(16) =1346491a(17) =325231a(18) =430711a(19) =2139271a(20) =2561161a(21) =81721a(22) =4319041a(23) =571381a(24) =4331251a(25) =1232251a(26) =7114471a(27) =3185011a(28) =407581a(29) =1500631