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 A172272 #7 Sep 08 2022 08:45:50
%S A172272 0,1,3,4,6,7,9,11,12,14,15,17,19,20,22,23,25,26,28,30,31,33,34,36,38,
%T A172272 39,41,42,44,45,47,49,50,52,53,55,57,58,60,61,63,64,66,68,69,71,72,74,
%U A172272 76,77,79,80,82,83,85,87,88,90,91,93,95,96,98,99,101,102,104,106,107
%N A172272 a(n) = floor(n*(sqrt(11)-sqrt(3))).
%H A172272 Vincenzo Librandi, <a href="/A172272/b172272.txt">Table of n, a(n) for n = 0..1000</a>
%t A172272 With[{c = Sqrt[11] - Sqrt[3]}, Floor[c Range[0, 80]]] (* _Vincenzo Librandi_, Aug 01 2013 *)
%o A172272 (Magma) [Floor(n*(Sqrt(11)-Sqrt(3))): n in [0..80]]; // _Vincenzo Librandi_, Aug 01 2013
%Y A172272 Cf. A172264, A172266-A172270, A172273-A172278.
%K A172272 nonn,easy
%O A172272 0,3
%A A172272 _Vincenzo Librandi_, Jan 30 2010