Integers n such that 10^n-57 is prime.

Terms

a(0) =2a(1) =7a(2) =10a(3) =11a(4) =17a(5) =19a(6) =39a(7) =49a(8) =50a(9) =61a(10) =95a(11) =106a(12) =187a(13) =196a(14) =849a(15) =889a(16) =6436a(17) =7370a(18) =14446a(19) =19647a(20) =34399a(21) =39922a(22) =81297a(23) =84305