Powers of cube root of 17 rounded up.

Terms

a(0) =1a(1) =3a(2) =7a(3) =17a(4) =44a(5) =113a(6) =289a(7) =744a(8) =1911a(9) =4913a(10) =12633a(11) =32483a(12) =83521a(13) =214757a(14) =552199a(15) =1419857a(16) =3650853a(17) =9387369a(18) =24137569a(19) =62064487a(20) =159585273a(21) =410338673a(22) =1055096276a(23) =2712949631a(24) =6975757441a(25) =17936636689a(26) =46120143717a(27) =118587876497a(28) =304922823712