a(n) preceded and followed by nextprime(a(n)) is a prime.

Terms

a(0) =5a(1) =11a(2) =12a(3) =13a(4) =15a(5) =16a(6) =19a(7) =29a(8) =30a(9) =42a(10) =43a(11) =45a(12) =46a(13) =75a(14) =88a(15) =89a(16) =97a(17) =103a(18) =113a(19) =117a(20) =125a(21) =126a(22) =137a(23) =149a(24) =150a(25) =162a(26) =163a(27) =174a(28) =198a(29) =200