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 A055528 #20 Mar 18 2024 12:05:38
%S A055528 0,1,18,207,2134,21465,214866,2149003,21490542,214906149,2149062490,
%T A055528 21490626231,214906264038,2149062642577,21490626428514,
%U A055528 214906264288515,2149062642889246,21490626428897373,214906264288979562,2149062642889802479,21490626428898032790
%N A055528 a(n) = 10*a(n-1)+n^3, a(0)=0.
%C A055528 a(n)/10^n converges to 470/2187=0.214906264...
%H A055528 <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (14,-46,64,-41,10).
%F A055528 a(n) = (10^n-1)*(470/2187)-n^3/9-n^2*(10/27)-n*(110/243).
%F A055528 G.f.: -x*(x^2+4*x+1) / ((x-1)^4*(10*x-1)). - _Colin Barker_, Sep 13 2014
%t A055528 RecurrenceTable[{a[0]==0,a[n]==10a[n-1]+n^3},a,{n,20}] (* _Harvey P. Dale_, Mar 21 2023 *)
%o A055528 (PARI) concat(0, Vec(-x*(x^2+4*x+1)/((x-1)^4*(10*x-1)) + O(x^100))) \\ _Colin Barker_, Sep 13 2014
%Y A055528 Cf. A014824.
%K A055528 nonn,easy
%O A055528 0,3
%A A055528 _Henry Bottomley_, Jul 04 2000
%E A055528 Corrected by _T. D. Noe_, Nov 08 2006
%E A055528 More terms from _Colin Barker_, Sep 13 2014