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 A135671 #16 Sep 08 2022 08:45:32
%S A135671 0,1,1,2,3,3,4,4,5,6,7,7,8,9,9,10,11,12,12,13,14,15,15,16,17,18,18,19,
%T A135671 20,21,22,22,23,24,25,26,26,27,28,29,30,30,31,32,33,34,34,35,36,37,38,
%U A135671 39,39,40,41,42,43,44,44,45,46
%N A135671 a(n) = ceiling(n - n^(2/3)).
%H A135671 Vincenzo Librandi, <a href="/A135671/b135671.txt">Table of n, a(n) for n = 1..1000</a>
%t A135671 Table[Ceiling[n - n^(2/3)], {n, 100}] (* _Vincenzo Librandi_, Feb 16 2013 *)
%o A135671 (Magma) [Ceiling(n - n^(2/3)): n in [1..100]]; // _Vincenzo Librandi_, Feb 16 2013
%o A135671 (PARI) a(n)=n-sqrtnint(n^2,3) \\ _Charles R Greathouse IV_, Sep 02 2015
%Y A135671 Cf. A135660, A135661, A135662, A135663, A135664, A135665, A028391, A135668, A135669, A135670.
%K A135671 nonn,easy
%O A135671 1,4
%A A135671 _Mohammad K. Azarian_, Nov 25 2007
%E A135671 Offset corrected by _Mohammad K. Azarian_, Nov 19 2008