Numbers k such that 2*5^k + 3 is prime.

Terms

a(0) =0a(1) =1a(2) =2a(3) =6a(4) =7a(5) =26a(6) =35a(7) =50a(8) =115a(9) =171a(10) =204a(11) =219a(12) =362a(13) =644a(14) =1959a(15) =4427a(16) =5406a(17) =8030a(18) =10755a(19) =67826