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 A202306 #16 Aug 06 2025 08:45:06
%S A202306 0,2,3,4,5,5,6,7,7,7,8,8,9,9,9,10,10,10,11,11,11,12,12,12,12,13,13,13,
%T A202306 14,14,14,14,14,15,15,15,15,16,16,16,16,16,17,17,17,17,17,18,18,18,18,
%U A202306 18,19,19,19,19,19,19,20,20,20,20,20,21,21,21,21,21,21
%N A202306 a(n) = floor(sqrt(7*n)).
%H A202306 Vincenzo Librandi, <a href="/A202306/b202306.txt">Table of n, a(n) for n = 0..10000</a>
%F A202306 a(n) = A000196(7*n).
%t A202306 Table[Floor[Sqrt[7n]],{n,0,80}]
%o A202306 (Magma) [Floor(Sqrt(7*n)) : n in [0..80]];
%o A202306 (PARI) a(n)=sqrtint(7*n) \\ _Charles R Greathouse IV_, Jan 17 2012
%Y A202306 Cf. A172471, A202304, A202305.
%K A202306 nonn,easy
%O A202306 0,2
%A A202306 _Vincenzo Librandi_, Jan 17 2012