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 A018014 #12 Sep 08 2022 08:44:44
%S A018014 1,3,6,13,31,72,169,398,935,2197,5166,12147,28561,67157,157908,371293,
%T A018014 873035,2052796,4826809,11349444,26686341,62748517,147542765,
%U A018014 346922421,815730721,1918055941,4509991466,10604499373,24934727222,58629889046,137858491849
%N A018014 Powers of cube root of 13 rounded up.
%H A018014 Vincenzo Librandi, <a href="/A018014/b018014.txt">Table of n, a(n) for n = 0..200</a>
%t A018014 Ceiling[Surd[13,3]^Range[0,30]] (* _Harvey P. Dale_, Nov 06 2013 *)
%t A018014 Table[Ceiling[13^(n/3)], {n, 0, 40}] (* _Vincenzo Librandi_, Jan 09 2014 *)
%o A018014 (Magma) [Ceiling(13^(n/3)): n in [0..40]]; // _Vincenzo Librandi_, Jan 09 2014
%Y A018014 Cf. powers of cube root of k ceiling up: A017981 (k=2), A017984 (k=3), A017987 (k=4), A017990 (k=5), A017993 (k=6), A017996 (k=7), A018002 (k=9), A018005 (k=10), A018008 (k=11), A018011 (k=12), this sequence (k=13), A018017 (k=14), A018020 (k=15), A018023 (k=16), A018026 (k=17), A018029 (k=18), A018032 (k=19), A018035 (k=20), A018038 (k=21), A018041 (k=22), A018044 (k=23), A018047 (k=24).
%K A018014 nonn
%O A018014 0,2
%A A018014 _N. J. A. Sloane_
%E A018014 More terms from _Vincenzo Librandi_, Jan 09 2014