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 A171982 #20 Sep 08 2022 08:45:50
%S A171982 3,6,9,13,16,19,23,26,29,33,36,39,43,46,49,53,56,59,63,66,69,72,76,79,
%T A171982 82,86,89,92,96,99,102,106,109,112,116,119,122,126,129,132,135,139,
%U A171982 142,145,149,152,155,159,162,165,169,172,175,179,182,185,189,192,195,198
%N A171982 Beatty sequence for sqrt(11).
%H A171982 Vincenzo Librandi, <a href="/A171982/b171982.txt">Table of n, a(n) for n = 1..1000</a>
%F A171982 a(n) = floor(n*sqrt(11)). - _Jon E. Schoenfield_, Jun 18 2010
%t A171982 With[{c = Sqrt[11]}, Floor[c #]& / @Range[1, 80]] (* _Vincenzo Librandi_, Aug 01 2013 *)
%o A171982 (PARI) a(n)=sqrtint(11*n^2) \\ _Charles R Greathouse IV_, Dec 28 2011
%o A171982 (Magma) [Isqrt(11*n^2): n in [1..80]]; // _Vincenzo Librandi_, Aug 01 2013
%K A171982 nonn,easy
%O A171982 1,1
%A A171982 _Vincenzo Librandi_, Jan 21 2010