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 A183572 #18 Sep 08 2022 08:45:55
%S A183572 2,3,5,6,8,9,10,11,13,14,15,16,18,19,20,21,22,23,25,26,27,28,29,30,32,
%T A183572 33,34,35,36,37,38,39,41,42,43,44,45,46,47,48,50,51,52,53,54,55,56,57,
%U A183572 58,59,61,62,63,64,65,66,67,68,69,70,72,73,74,75,76,77,78,79,80,81,82,83,85,86,87,88,89,90,91,92
%N A183572 a(n) = n + floor(sqrt(2*n-1)).
%H A183572 Vincenzo Librandi, <a href="/A183572/b183572.txt">Table of n, a(n) for n = 1..10000</a>
%H A183572 Steve Butler and Jia Mao, <a href="http://www.jstor.org/stable/27642123">Problem 11265</a>, Amer. Math. Monthly 114, (2007), p77.
%t A183572 Table[n + Floor[Sqrt[2 n - 1]], {n, 100}] (* _Vincenzo Librandi_, Feb 18 2017 *)
%o A183572 (Magma) [n+Floor(Sqrt(2*n-1)): n in [1..80]]; // _Vincenzo Librandi_, Feb 18 2017
%o A183572 (PARI) a(n) = n + sqrtint(2*n-1); \\ _Michel Marcus_, Feb 18 2017
%Y A183572 Cf. A074148 (complement), A103128.
%K A183572 nonn,easy
%O A183572 1,1
%A A183572 _Clark Kimberling_, Jan 05 2011