This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A017989 #13 Jul 08 2025 06:21:11
%S A017989 1,2,3,5,9,15,25,43,73,125,214,366,625,1069,1828,3125,5344,9138,15625,
%T A017989 26718,45688,78125,133592,228439,390625,667959,1142194,1953125,
%U A017989 3339797,5710972,9765625,16698984,28554861,48828125,83494919,142774304,244140625,417474596
%N A017989 Powers of cube root of 5 rounded to nearest integer.
%H A017989 Vincenzo Librandi, <a href="/A017989/b017989.txt">Table of n, a(n) for n = 0..200</a>
%t A017989 Table[Round[5^(n/3)], {n, 0, 40}] (* _Vincenzo Librandi_, Jan 07 2014 *)
%t A017989 Round[Surd[5,3]^Range[0,40]] (* _Harvey P. Dale_, Mar 24 2018 *)
%o A017989 (Magma) [Round(5^(n/3)): n in [0..50]]; // _Vincenzo Librandi_, Jan 07 2014
%Y A017989 Cf. powers of cube root of k rounded up: A017980 (k=2), A017983 (k=3), A017986 (k=4), this sequence (k=5), A017992 (k=6), A017995 (k=7), A018001 (k=9), A018004 (k=10), A018007 (k=11), A018010 (k=12), A018013 (k=13), A018016 (k=14), A018019 (k=15), A018022 (k=16), A018025 (k=17), A018028 (k=18), A018031 (k=19), A018034 (k=20), A018037 (k=21), A018040 (k=22), A018043 (k=23), A018046 (k=24).
%K A017989 nonn
%O A017989 0,2
%A A017989 _N. J. A. Sloane_
%E A017989 More terms from _Vincenzo Librandi_, Jan 07 2014