Smallest number at distance exactly 3n from nearest prime.

Terms

a(0) =2a(1) =26a(2) =119a(3) =532a(4) =1339a(5) =1342a(6) =9569a(7) =15704a(8) =19633a(9) =31424a(10) =31427a(11) =31430a(12) =31433a(13) =155960a(14) =155963a(15) =360698a(16) =360701a(17) =370312a(18) =370315a(19) =492170a(20) =1357261a(21) =1357264a(22) =1357267a(23) =2010802a(24) =2010805a(25) =4652428a(26) =17051785a(27) =17051788a(28) =17051791a(29) =17051794