a(n) = floor(n^(n^(1/3))).

Terms

a(0) =1a(1) =2a(2) =4a(3) =9a(4) =15a(5) =25a(6) =41a(7) =64a(8) =96a(9) =142a(10) =207a(11) =295a(12) =416a(13) =578a(14) =795a(15) =1081a(16) =1458a(17) =1948a(18) =2583a(19) =3400a(20) =4445a(21) =5774a(22) =7457a(23) =9576a(24) =12234a(25) =15554a(26) =19683a(27) =24798a(28) =31113a(29) =38882