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 A172331 #11 Jun 26 2025 14:50:18
%S A172331 0,6,12,18,25,31,37,43,50,56,62,68,75,81,87,93,100,106,112,118,125,
%T A172331 131,137,143,150,156,162,168,175,181,187,193,200,206,212,218,225,231,
%U A172331 237,243,250,256,262,268,275,281,287,293,300,306,312
%N A172331 a(n) = floor(n*(sqrt(13)+sqrt(7))).
%C A172331 Also integer part of n*6.2513025865..., where the constant is the largest root of x^4 -40*x^2 +36.
%H A172331 Vincenzo Librandi, <a href="/A172331/b172331.txt">Table of n, a(n) for n = 0..1000</a>
%t A172331 With[{c = Sqrt[13] + Sqrt[7]}, Floor[c Range[0, 70]]] (* _Vincenzo Librandi_, Aug 01 2013 *)
%o A172331 (Magma) [Floor(n*(Sqrt(13)+Sqrt(7))): n in [0..60]];
%Y A172331 Cf. A110117, A172323-A172332, A172334, A172336-A172338.
%K A172331 nonn,easy,less
%O A172331 0,2
%A A172331 _Vincenzo Librandi_, Feb 01 2010