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 A198270 #10 Sep 08 2022 08:45:59
%S A198270 0,4,8,11,15,19,22,26,29,33,37,40,44,47,51,55,58,62,65,69,73,76,80,83,
%T A198270 87,91,94,98,101,105,109,112,116,119,123,127,130,134,138,141,145,148,
%U A198270 152,156,159,163,166,170,174,177,181,184,188,192
%N A198270 Ceiling(n*sqrt(13)).
%H A198270 Vincenzo Librandi, <a href="/A198270/b198270.txt">Table of n, a(n) for n = 0..10000</a>
%t A198270 With[{c=Sqrt[13]},Ceiling[c*Range[0,60]]] (* _Harvey P. Dale_, Jul 31 2012 *)
%o A198270 (Magma) [Ceiling(n*Sqrt(13)): n in [0..60]]
%Y A198270 Cf. A171983.
%K A198270 nonn,easy
%O A198270 0,2
%A A198270 _Vincenzo Librandi_, Oct 24 2011