Numbers k such that 4*10^k + 63 is prime.

Terms

a(0) =0a(1) =1a(2) =2a(3) =4a(4) =6a(5) =9a(6) =11a(7) =14a(8) =16a(9) =26a(10) =54a(11) =74a(12) =111a(13) =130a(14) =152a(15) =253a(16) =345a(17) =607a(18) =686a(19) =1590a(20) =2711a(21) =5462a(22) =7021a(23) =8681a(24) =11044a(25) =18132a(26) =24072a(27) =25211a(28) =44332a(29) =52792