a[n] is the 5th term in Euclid-Mullin (EM) prime sequence initiated with n-th prime.

Terms

a(0) =13a(1) =13a(2) =331a(3) =13a(4) =7a(5) =6163a(6) =7a(7) =571a(8) =13a(9) =10267a(10) =23a(11) =31a(12) =7a(13) =13a(14) =17a(15) =7a(16) =3a(17) =7a(18) =5227a(19) =43a(20) =7a(21) =2371a(22) =7a(23) =61a(24) =19a(25) =3a(26) =7a(27) =13a(28) =3271a(29) =13