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 A159027 #13 May 01 2020 16:22:14 %S A159027 109,119,129,140,151,163,175,188,201,215,229,244,259,275,291,308,325, %T A159027 343,361,380,399,418,438,458,479,500,522,544,567,590,614,638,663,688, %U A159027 714,740,767,794,822,850,879,908,938,968,999,1030,1062,1094,1127,1160,1194,1228,1263,1298,1334,1370,1407,1444 %N A159027 a(0)=109; a(n) = a(n-1) + floor(sqrt(a(n-1))), n > 0. %C A159027 Row 9 in square array A159016. %C A159027 This sequence contains infinitely many squares. - _Philippe Deléham_, Apr 04 2009 %H A159027 Harvey P. Dale, <a href="/A159027/b159027.txt">Table of n, a(n) for n = 0..1000</a> %t A159027 NestList[#+Floor[Sqrt[#]]&,109,60] (* _Harvey P. Dale_, May 01 2020 *) %Y A159027 Cf. A028392, A110288. %K A159027 nonn %O A159027 0,1 %A A159027 _Philippe Deléham_, Apr 02 2009 %E A159027 More terms from _Vincenzo Librandi_, Apr 10 2009