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 A187330 #10 Dec 19 2021 15:21:40
%S A187330 0,1,3,5,7,8,10,12,14,15,17,19,21,22,24,26,28,29,31,33,35,37,38,40,42,
%T A187330 44,45,47,49,51,52,54,56,58,59,61,63,65,67,68,70,72,74,75,77,79,81,82,
%U A187330 84,86,88,89,91,93,95,97,98,100,102,104,105,107,109,111
%N A187330 a(n) = floor((4-sqrt(5))*n); complement of A187339.
%H A187330 Robert Israel, <a href="/A187330/b187330.txt">Table of n, a(n) for n = 0..10000</a>
%F A187330 a(n)=floor((4-sqrt(5))n).
%p A187330 seq(floor((4-sqrt(5))*n),n=0..200); # _Robert Israel_, Dec 19 2021
%t A187330 Table[Floor[(4-5^(1/2))n], {n,0,120}]
%Y A187330 Cf. A187339.
%K A187330 nonn
%O A187330 0,3
%A A187330 _Clark Kimberling_, Mar 08 2011