Numbers k such that A049614(k) + A000040(k) is prime.

Terms

a(0) =1a(1) =4a(2) =6a(3) =7a(4) =8a(5) =13a(6) =17a(7) =18a(8) =21a(9) =41a(10) =86a(11) =101a(12) =144a(13) =368a(14) =1232a(15) =1713a(16) =2431a(17) =2897a(18) =6122a(19) =6240a(20) =6876