Numbers k such that 8*10^k + 81 is prime.

Terms

a(0) =0a(1) =2a(2) =3a(3) =9a(4) =11a(5) =26a(6) =39a(7) =42a(8) =58a(9) =75a(10) =105a(11) =167a(12) =279a(13) =561a(14) =2152a(15) =2378a(16) =3774a(17) =5001a(18) =5736a(19) =9470a(20) =13419a(21) =14535a(22) =32291a(23) =89800a(24) =146421