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 A132913 #10 Jul 31 2018 16:00:08
%S A132913 2,3,4,4,4,5,5,5,6,6,6,6,6,7,7,7,7,7,8,8,8,8,8,8,8,9,9,9,9,9,9,9,9,10,
%T A132913 10,10,10,10,10,10,10,10,11,11,11,11,11,11,11,11,11,11,12,12,12,12,12,
%U A132913 12,12,12,12,12,12,12,13,13
%N A132913 a(n) = ceiling(sqrt(n) + n^(1/3)).
%t A132913 Table[Ceiling[Sqrt[n]+Surd[n,3]],{n,70}] (* _Harvey P. Dale_, Jul 31 2018 *)
%Y A132913 Cf. A000196, A003059, A134914, A134915, A134916.
%K A132913 nonn
%O A132913 1,1
%A A132913 _Mohammad K. Azarian_, Nov 18 2007