Numbers k such that 10^k - 701 is prime.

Terms

a(0) =7a(1) =13a(2) =22a(3) =28a(4) =29a(5) =49a(6) =53a(7) =70a(8) =124a(9) =151a(10) =287a(11) =394a(12) =400a(13) =946a(14) =979a(15) =1270a(16) =3857a(17) =3944a(18) =5435a(19) =9125a(20) =9589a(21) =49711a(22) =51091a(23) =56849