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 A024113 #20 Jan 15 2023 09:53:03
%S A024113 1,8,-4015,-530712,-16770655,-244081576,-2176250895,-13836504232,
%T A024113 -68676430015,-282042115992,-996513215599,-3107047317112,
%U A024113 -8633670911775,-20756219294152,-33817119920335,76144794204024,1571545212141185,16094559462436808,148937803915572945
%N A024113 a(n) = 9^n-n^12.
%H A024113 Vincenzo Librandi, <a href="/A024113/b024113.txt">Table of n, a(n) for n = 0..300</a>
%H A024113 <a href="/index/Rec#order_14">Index entries for linear recurrences with constant coefficients</a>, signature (22,-195,988,-3289,7722,-13299,17160,-16731,12298,-6721,2652,-715,118,-9).
%F A024113 a(n) = A001019(n) - A008456(n). - _Wesley Ivan Hurt_, May 25 2014
%F A024113 G.f.: (8*x^13 +36759*x^12 +4300278*x^11 +91211180*x^10 +586677866*x^9 +1396293387*x^8 +1300096572*x^7 +434355696*x^6 +25369404*x^5 -5882531*x^4 -441810*x^3 -3996*x^2 -14*x +1) / ((x -1)^13*(9*x -1)). - _Colin Barker_, May 26 2014
%p A024113 A024113:=n->9^n - n^12; seq(A024113(n), n=0..20); # _Wesley Ivan Hurt_, May 25 2014
%t A024113 Table[9^n - n^12, {n, 0, 20}] (* _Wesley Ivan Hurt_, May 25 2014 *)
%o A024113 (Magma) [9^n-n^12: n in [0..20]]; // _Vincenzo Librandi_, Jun 30 2011
%Y A024113 Cf. A001019, A008456.
%K A024113 sign,easy
%O A024113 0,2
%A A024113 _N. J. A. Sloane_, Jun 14 1998