Numbers k such that 5*10^k - 3 is prime.

Terms

a(0) =0a(1) =1a(2) =15a(3) =41a(4) =64a(5) =131a(6) =138a(7) =192a(8) =287a(9) =495a(10) =966a(11) =1091a(12) =1366a(13) =1714a(14) =1774a(15) =3253a(16) =6331a(17) =35326a(18) =36991a(19) =59586a(20) =88261a(21) =127179