Powers of fifth root of 15 rounded up.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =9a(5) =15a(6) =26a(7) =45a(8) =77a(9) =131a(10) =225a(11) =387a(12) =665a(13) =1143a(14) =1964a(15) =3375a(16) =5801a(17) =9971a(18) =17137a(19) =29455a(20) =50625a(21) =87013a(22) =149556a(23) =257052a(24) =441813a(25) =759375a(26) =1305193a(27) =2243329a(28) =3855770a(29) =6627189