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 A195129 #11 Sep 08 2022 08:45:59 %S A195129 0,2,3,5,6,8,9,10,12,13,15,16,18,19,20,22,23,25,26,28,29,30,32,33,35, %T A195129 36,37,39,40,42,43,45,46,47,49,50,52,53,55,56,57,59,60,62,63,65,66,67, %U A195129 69,70,72,73,74,76,77,79,80,82,83,84,86,87,89,90,92,93,94,96,97,99 %N A195129 a(n) = 2*n - floor(n*sqrt(1/3)). %H A195129 Vincenzo Librandi, <a href="/A195129/b195129.txt">Table of n, a(n) for n = 0..10000</a> %o A195129 (Magma) [2*n-Floor(n*(Sqrt(1/3))): n in [0..70]]; // _Vincenzo Librandi_, Sep 12 2011 %K A195129 nonn %O A195129 0,2 %A A195129 _Clark Kimberling_, Sep 09 2011