Primes preceding the first-occurrence gaps in A014320.

Terms

a(0) =2a(1) =3a(2) =7a(3) =23a(4) =89a(5) =113a(6) =139a(7) =199a(8) =523a(9) =887a(10) =1129a(11) =1327a(12) =1669a(13) =1831a(14) =2477a(15) =2971a(16) =4297a(17) =5591a(18) =9551a(19) =15683a(20) =16141a(21) =19333a(22) =19609a(23) =28229a(24) =30593a(25) =31397a(26) =31907a(27) =34061a(28) =35617a(29) =43331