Powers of cube root of 3 rounded up.

Terms

a(0) =1a(1) =2a(2) =3a(3) =3a(4) =5a(5) =7a(6) =9a(7) =13a(8) =19a(9) =27a(10) =39a(11) =57a(12) =81a(13) =117a(14) =169a(15) =243a(16) =351a(17) =506a(18) =729a(19) =1052a(20) =1517a(21) =2187a(22) =3155a(23) =4550a(24) =6561a(25) =9463a(26) =13648a(27) =19683a(28) =28388a(29) =40943