Numbers k such that 7*10^k + 57 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =6a(5) =7a(6) =12a(7) =14a(8) =19a(9) =21a(10) =27a(11) =33a(12) =60a(13) =61a(14) =91a(15) =102a(16) =535a(17) =549a(18) =614a(19) =695a(20) =709a(21) =1014a(22) =2448a(23) =2519a(24) =3464a(25) =3511a(26) =6348a(27) =6841a(28) =11009a(29) =11177