Numbers k such that 5*10^k + 57 is prime.

Terms

a(0) =1a(1) =2a(2) =5a(3) =8a(4) =14a(5) =23a(6) =24a(7) =26a(8) =41a(9) =62a(10) =85a(11) =137a(12) =209a(13) =446a(14) =1424a(15) =1783a(16) =3301a(17) =5503a(18) =5928a(19) =9593a(20) =18671a(21) =40189a(22) =60655a(23) =113586a(24) =172692