Numbers k such that 56*10^k - 3 is prime.

Terms

a(0) =0a(1) =1a(2) =3a(3) =6a(4) =10a(5) =18a(6) =21a(7) =34a(8) =44a(9) =105a(10) =154a(11) =163a(12) =189a(13) =382a(14) =421a(15) =2473a(16) =2664a(17) =4590a(18) =9804a(19) =19950a(20) =29992a(21) =38457a(22) =40249a(23) =124656a(24) =185139a(25) =195032