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 A172266 #9 Sep 08 2022 08:45:50
%S A172266 0,0,1,2,3,4,4,5,6,7,8,9,9,10,11,12,13,13,14,15,16,17,18,18,19,20,21,
%T A172266 22,23,23,24,25,26,27,27,28,29,30,31,32,32,33,34,35,36,36,37,38,39,40,
%U A172266 41,41,42,43,44,45,46,46,47,48,49,50,50,51,52,53,54,55,55,56,57,58,59,59
%N A172266 a(n) = floor(n*(sqrt(5)-sqrt(2))).
%H A172266 Vincenzo Librandi, <a href="/A172266/b172266.txt">Table of n, a(n) for n = 0..1000</a>
%t A172266 With[{c = Sqrt[5] - Sqrt[2]}, Floor[c Range[0, 80]]] (* _Vincenzo Librandi_, Aug 01 2013 *)
%o A172266 (Magma) [Floor(n*(Sqrt(5)-Sqrt(2))): n in [0..80]]; // _Vincenzo Librandi_, Aug 01 2013
%o A172266 (PARI) a(n)=(sqrt(5)-sqrt(2))*n\1 \\ _Charles R Greathouse IV_, Sep 02 2015
%Y A172266 Cf. A172264, A172267-A172270, A172272-A172278.
%K A172266 nonn,easy
%O A172266 0,4
%A A172266 _Vincenzo Librandi_, Jan 30 2010