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 A162263 #16 Aug 31 2018 02:56:36
%S A162263 9,29,66,126,215,339,504,716,981,1305,1694,2154,2691,3311,4020,4824,
%T A162263 5729,6741,7866,9110,10479,11979,13616,15396,17325,19409,21654,24066,
%U A162263 26651,29415,32364,35504,38841,42381,46130,50094,54279,58691,63336
%N A162263 a(n) = (2*n^3 + 5*n^2 + 11*n)/2.
%H A162263 Vincenzo Librandi, <a href="/A162263/b162263.txt">Table of n, a(n) for n = 1..1000</a>
%H A162263 <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (4,-6,4,-1).
%F A162263 Row sums from A154631: a(n) = Sum_{m=1..n} (2*m*n + m + n + 5).
%F A162263 From _Vincenzo Librandi, Mar 05 2012: (Start)
%F A162263 G.f.: x*(9 - 7*x + 4*x^2)/(1-x)^4.
%F A162263 a(n) = 4*a(n-1) - 6*a(n-2) + 4*a(n-3) - a(n-4). (End)
%t A162263 LinearRecurrence[{4, -6, 4, -1}, {9, 29, 66, 126}, 50] (* or *) CoefficientList[Series[(9-7*x+4*x^2)/(1-x)^4,{x,0,40}],x] (* _Vincenzo Librandi_, Mar 05 2012 *)
%Y A162263 Cf. A154631.
%K A162263 nonn,easy
%O A162263 1,1
%A A162263 _Vincenzo Librandi_, Jun 29 2009
%E A162263 New name from _Vincenzo Librandi_, Mar 05 2012