Numbers k such that 10^k - 20001 is prime.

Terms

a(0) =5a(1) =11a(2) =16a(3) =21a(4) =37a(5) =83a(6) =94a(7) =299a(8) =318a(9) =467a(10) =622a(11) =707a(12) =1931a(13) =2175a(14) =2189a(15) =2238a(16) =2526a(17) =5202a(18) =10541a(19) =15822a(20) =17407a(21) =19919a(22) =19998a(23) =25407a(24) =96377a(25) =118009