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 A172277 #10 Sep 08 2022 08:45:50
%S A172277 0,1,3,5,7,9,11,13,14,16,18,20,22,24,26,28,29,31,33,35,37,39,41,43,44,
%T A172277 46,48,50,52,54,56,58,59,61,63,65,67,69,71,73,74,76,78,80,82,84,86,88,
%U A172277 89,91,93,95,97,99,101,103,104,106,108,110,112,114,116,118,119,121,123
%N A172277 floor(n*(sqrt(13)-sqrt(3))).
%H A172277 Vincenzo Librandi, <a href="/A172277/b172277.txt">Table of n, a(n) for n = 0..1000</a>
%p A172277 A172277:=n->floor(n*(sqrt(13)-sqrt(3))); seq(A172277(k), k=0..100); # _Wesley Ivan Hurt_, Nov 08 2013
%t A172277 With[{c = Sqrt[13] - Sqrt[3]}, Floor[c Range[0, 80]]] (* _Vincenzo Librandi_, Aug 01 2013 *)
%o A172277 (Magma) [Floor(n*(Sqrt(13)-Sqrt(3))): n in [0..80]]; // _Vincenzo Librandi_, Aug 01 2013
%Y A172277 Cf. A172264, A172266-A172270, A172272-A172278.
%K A172277 nonn,easy
%O A172277 0,3
%A A172277 _Vincenzo Librandi_, Jan 30 2010