Powers of fourth root of 20 rounded to nearest integer.

Terms

a(0) =1a(1) =2a(2) =4a(3) =9a(4) =20a(5) =42a(6) =89a(7) =189a(8) =400a(9) =846a(10) =1789a(11) =3783a(12) =8000a(13) =16918a(14) =35777a(15) =75659a(16) =160000a(17) =338359a(18) =715542a(19) =1513187a(20) =3200000a(21) =6767176a(22) =14310835a(23) =30263731a(24) =64000000a(25) =135343522a(26) =286216701a(27) =605274630a(28) =1280000000