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 A159020 #10 Sep 01 2018 15:33:50 %S A159020 11,14,17,21,25,30,35,40,46,52,59,66,74,82,91,100,110,120,130,141,152, %T A159020 164,176,189,202,216,230,245,260,276,292,309,326,344,362,381,400,420, %U A159020 440,460,481,502,524,546,569 %N A159020 a(0)=11; a(n) = a(n-1) + floor(sqrt(a(n-1))), n > 0. %C A159020 Row 2 in square array A159016. %C A159020 This sequence contains an infinite number of squares. - _Philippe Deléham_, Apr 04 2009 %C A159020 The squares in this sequence are A020714(k)^2, k=0,1,2,.... - _Vincenzo Librandi_, Apr 20 2009 [clarified by _R. J. Mathar_, Dec 05 2010] %Y A159020 Cf. A028392, A020714. %K A159020 nonn %O A159020 0,1 %A A159020 _Philippe Deléham_, Apr 02 2009