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 A017019 #15 Oct 17 2023 17:57:21 %S A017019 27,1000,4913,13824,29791,54872,91125,140608,205379,287496,389017, %T A017019 512000,658503,830584,1030301,1259712,1520875,1815848,2146689,2515456, %U A017019 2924207,3375000,3869893,4410944,5000211 %N A017019 a(n) = (7*n + 3)^3. %H A017019 Vincenzo Librandi, <a href="/A017019/b017019.txt">Table of n, a(n) for n = 0..10000</a> %H A017019 <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (4,-6,4,-1). %F A017019 From _G. C. Greubel_, Oct 17 2023: (Start) %F A017019 G.f.: (27 + 892*x + 1075*x^2 + 64*x^3)/(1 - x)^4. %F A017019 E.g.f.: (27 + 973*x + 1470*x^2 + 343*x^3)*exp(x). (End) %t A017019 (7*Range[0, 40] +3)^3 (* _G. C. Greubel_, Oct 17 2023 *) %o A017019 (Magma) [(7*n+3)^3: n in [0..35]]; // _Vincenzo Librandi_, Jul 14 2011 %o A017019 (SageMath) [(7*n+3)^3 for n in range(41)] # _G. C. Greubel_, Oct 17 2023 %Y A017019 Cf. A017017, A017018, A017020 - A017028. %K A017019 nonn,easy %O A017019 0,1 %A A017019 _N. J. A. Sloane_