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 A018052 #15 Jul 08 2025 06:22:03 %S A018052 1,1,2,2,3,4,5,7,9,12,16,21,27,36,47,62,81,107,140,185,243,320,421, %T A018052 554,729,959,1263,1662,2187,2878,3788,4985,6561,8635,11364,14956, %U A018052 19683,25904,34092,44868,59049,77713 %N A018052 Powers of fourth root of 3 rounded to nearest integer. %H A018052 Vincenzo Librandi, <a href="/A018052/b018052.txt">Table of n, a(n) for n = 0..1000</a> %t A018052 Floor[# + 1/2]&/@((Power[3, (4)^-1])^Range[0, 50]) (* _Vincenzo Librandi_, Apr 13 2017 *) %t A018052 Round[Surd[3,4]^Range[0,50]] (* _Harvey P. Dale_, Apr 13 2022 *) %Y A018052 Cf. A011002, A018053. %K A018052 nonn %O A018052 0,3 %A A018052 _N. J. A. Sloane_