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 A202308 #16 Aug 06 2025 08:47:13
%S A202308 0,3,5,6,7,8,8,9,10,10,11,11,12,13,13,13,14,14,15,15,16,16,16,17,17,
%T A202308 18,18,18,19,19,19,20,20,20,21,21,21,21,22,22,22,23,23,23,23,24,24,24,
%U A202308 24,25,25,25,26,26,26,26,26,27,27,27,27,28,28,28,28,29,29
%N A202308 a(n) = floor(sqrt(13*n)).
%H A202308 Vincenzo Librandi, <a href="/A202308/b202308.txt">Table of n, a(n) for n = 0..10000</a>
%F A202308 a(n) = A000196(13*n).
%t A202308 Table[Floor[Sqrt[13n]],{n,0,80}]
%o A202308 (Magma) [Floor(Sqrt(13*n)) : n in [0..80]];
%o A202308 (PARI) sqrtint(13*n) \\ _Charles R Greathouse IV_, Jan 17 2012
%Y A202308 Cf. A172471, A202304, A202305, A202306, A202307.
%K A202308 nonn,easy
%O A202308 0,2
%A A202308 _Vincenzo Librandi_, Jan 17 2012