Each term is previous term plus ceiling of geometric mean of all previous terms.

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =9a(5) =13a(6) =18a(7) =24a(8) =31a(9) =39a(10) =48a(11) =59a(12) =71a(13) =85a(14) =101a(15) =119a(16) =139a(17) =162a(18) =187a(19) =215a(20) =246a(21) =280a(22) =318a(23) =359a(24) =404a(25) =453a(26) =507a(27) =565a(28) =628a(29) =697