Denominators of lower primes-only best approximates (POBAs) to e; see Comments.

Terms

a(0) =2a(1) =5a(2) =7a(3) =113a(4) =163a(5) =227a(6) =823a(7) =887a(8) =1093a(9) =2179a(10) =2591a(11) =2797a(12) =4373a(13) =4657a(14) =5651a(15) =8867a(16) =27673a(17) =32749a(18) =47189a(19) =104459a(20) =155723a(21) =430061a(22) =583853a(23) =673297a(24) =1126523a(25) =1869173a(26) =3120317a(27) =3445919a(28) =8341961a(29) =24681191