a(n) = prime(n) * prime(prime(n)).

Terms

a(0) =6a(1) =15a(2) =55a(3) =119a(4) =341a(5) =533a(6) =1003a(7) =1273a(8) =1909a(9) =3161a(10) =3937a(11) =5809a(12) =7339a(13) =8213a(14) =9917a(15) =12773a(16) =16343a(17) =17263a(18) =22177a(19) =25063a(20) =26791a(21) =31679a(22) =35773a(23) =41029a(24) =49373a(25) =55247a(26) =57989a(27) =62809a(28) =65291a(29) =69721