a(n) = smallest prime divisor of the number prime(n)!/9 + 1.

Terms

a(0) =3a(1) =31a(2) =31a(3) =23a(4) =379a(5) =83a(6) =610301a(7) =293a(8) =101a(9) =47a(10) =281a(11) =127a(12) =278174297a(13) =2971a(14) =109a(16) =46411a(17) =106087a(18) =269a(19) =288931a(20) =59047158151a(21) =120871a(22) =373a(23) =19140822523a(24) =56595118147a(25) =1708207a(26) =331a(27) =38749a(28) =157a(29) =2927a(30) =2143