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 A202304 #20 Sep 08 2022 08:46:01
%S A202304 0,1,2,3,3,3,4,4,4,5,5,5,6,6,6,6,6,7,7,7,7,7,8,8,8,8,8,9,9,9,9,9,9,9,
%T A202304 10,10,10,10,10,10,10,11,11,11,11,11,11,11,12,12,12,12,12,12,12,12,12,
%U A202304 13,13,13,13,13,13,13,13,13,14,14,14
%N A202304 a(n) = floor(sqrt(3*n)).
%H A202304 Vincenzo Librandi, <a href="/A202304/b202304.txt">Table of n, a(n) for n = 0..10000</a>
%F A202304 a(n) = A000196(3n), a(n)^2 = A048760(3n). - _Bruno Berselli_, Jan 18 2012
%t A202304 Table[Floor[Sqrt[3n]],{n,0,80}]
%o A202304 (Magma) [Isqrt(3*n) : n in [0..80]];
%o A202304 (PARI) a(n)=sqrtint(3*n) \\ _Charles R Greathouse IV_, Jan 17 2012
%Y A202304 Cf. A060018, A172471.
%K A202304 nonn,easy
%O A202304 0,3
%A A202304 _Vincenzo Librandi_, Jan 17 2012