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 A258809 #12 Sep 08 2022 08:46:12
%S A258809 0,255,6560,65535,390624,1679615,5764800,16777215,43046720,99999999,
%T A258809 214358880,429981695,815730720,1475789055,2562890624,4294967295,
%U A258809 6975757440,11019960575,16983563040,25599999999,37822859360,54875873535,78310985280,110075314175
%N A258809 a(n) = n^8 - 1.
%H A258809 <a href="/index/Rec#order_09">Index entries for linear recurrences with constant coefficients</a>, signature (9,-36,84,-126,126,-84,36,-9,1).
%F A258809 G.f.: x^2*(225 + 4535*x + 14595*x^2 + 18069*x^3 + 569*x^4 + 3999*x^5 - 2511*x^6 + 1079*x^7 - 270*x^8 + 30*x^9) / (1 - x)^9.
%F A258809 a(n) = 9*a(n-1) - 36*a(n-2) + 84*a(n-3) - 126*a(n-4) + 126*a(n-5) - 84*a(n-6) + 36*a(n-7) - 9*a(n-8) + a(n-9).
%F A258809 a(n) = (n - 1)*(n + 1)*(n^2 + 1)*(n^4 + 1) = -A024006(n). [_Bruno Berselli_, Jun 12 2015]
%t A258809 Table[n^8 - 1, {n, 33}] (* or *) LinearRecurrence[{9, -36, 84, -126, 126, -84, 36, -9, 1}, {0, 255, 6560, 65535, 390624, 1679615, 5764800, 16777215, 43046720}, 40]
%o A258809 (Magma) [n^8-1: n in [1..40]];
%Y A258809 Cf. A024006, A060890.
%Y A258809 Cf. similar sequences listed in A258807.
%K A258809 nonn,easy
%O A258809 1,2
%A A258809 _Vincenzo Librandi_, Jun 11 2015