Numerators of primes-only best approximates (POBAs) to Pi; see Comments.

Terms

a(0) =5a(1) =7a(2) =17a(3) =23a(4) =41a(5) =167a(6) =211a(7) =223a(8) =619a(9) =757a(10) =977a(11) =1109a(12) =4483a(13) =5237a(14) =5413a(15) =9497a(16) =14423a(17) =16063a(18) =18061a(19) =30841a(20) =45751a(21) =47881a(22) =60661a(23) =137341a(24) =162901a(25) =177811a(26) =211891a(27) =626443a(28) =833719a(29) =38144863