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 A018042 #13 Sep 08 2022 08:44:44
%S A018042 1,2,8,23,65,186,529,1504,4278,12167,34601,98401,279841,795830,
%T A018042 2263236,6436343,18304103,52054435,148035889,420994376,1197252006,
%U A018042 3404825447,9682870660,27536796142,78310985281,222706025200,633346311281,1801152661463,5122238579606
%N A018042 Powers of cube root of 23 rounded down.
%H A018042 Vincenzo Librandi, <a href="/A018042/b018042.txt">Table of n, a(n) for n = 0..200</a>
%t A018042 Table[Floor[23^(n/3)], {n, 0, 40}] (* _Vincenzo Librandi_, Jan 07 2014 *)
%o A018042 (Magma) [Floor(23^(n/3)): n in [0..40]]; // _Vincenzo Librandi_, Jan 07 2014
%o A018042 (PARI) a(n)=sqrtnint(23^n,3) \\ _Charles R Greathouse IV_, Nov 01 2016
%Y A018042 Cf. powers of cube root of k rounded down: A017979 (k=2), A017982 (k=3), A017985 (k=4), A017988 (k=5), A017991 (k=6), A017994 (k=7), A018000 (k=9), A018003 (k=10), A018006 (k=11), A018009 (k=12), A018012 (k=13), A018015 (k=14), A018018 (k=15), A018021 (k=16), A018024 (k=17), A018027 (k=18), A018030 (k=19), A018033 (k=20), A018036 (k=21), A018039 (k=22), this sequence (k=23), A018045 (k=24).
%K A018042 nonn
%O A018042 0,2
%A A018042 _N. J. A. Sloane_
%E A018042 More terms from _Vincenzo Librandi_, Jan 07 2014