Powers of fourth root of 10 rounded up.

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =10a(5) =18a(6) =32a(7) =57a(8) =100a(9) =178a(10) =317a(11) =563a(12) =1000a(13) =1779a(14) =3163a(15) =5624a(16) =10000a(17) =17783a(18) =31623a(19) =56235a(20) =100000a(21) =177828a(22) =316228a(23) =562342a(24) =1000000a(25) =1778280a(26) =3162278a(27) =5623414a(28) =10000000a(29) =17782795