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 A258810 #10 Jan 09 2025 14:50:58
%S A258810 0,511,19682,262143,1953124,10077695,40353606,134217727,387420488,
%T A258810 999999999,2357947690,5159780351,10604499372,20661046783,38443359374,
%U A258810 68719476735,118587876496,198359290367,322687697778,511999999999,794280046580,1207269217791,1801152661462
%N A258810 a(n) = n^9 - 1.
%H A258810 <a href="/index/Rec#order_10">Index entries for linear recurrences with constant coefficients</a>, signature (10,-45,120,-210,252,-210,120,-45,10,-1).
%F A258810 G.f.: x^2*(511 + 14572*x + 88318*x^2 + 156064*x^3 + 88360*x^4 + 14524*x^5 + 538*x^6 - 8*x^7 + x^8)/(1-x)^10.
%F A258810 a(n) = 10*a(n-1)-45*a(n-2)+120*a(n-3)-210*a(n-4)+252*a(n-5)-210*a(n-6)+120*a(n-7)-45*a(n-8)+10*a(n-9)-a(n-10).
%t A258810 Table[n^9 - 1, {n, 33}] (* or *) LinearRecurrence[{10, -45, 120, -210, 252, -210, 120, -45, 10, -1}, {0, 511, 19682, 262143, 1953124, 10077695, 40353606, 134217727, 387420488, 999999999}, 40]
%o A258810 (Magma) [n^9-1: n in [1..40]];
%o A258810 (Magma) I:=[0,511,19682, 262143,1953124,10077695,40353606,134217727,387420488, 999999999]; [n le 10 select I[n] else 10*Self(n-1)-45*Self(n-2)+120*Self(n-3)-210*Self(n-4)+252*Self(n-5)-210*Self(n-6)+120*Self(n-7)-45*Self(n-8)+10*Self(n-9)-Self(n-10): n in [1..40]];
%Y A258810 Cf. A024007, similar sequences listed in A258807.
%K A258810 nonn,easy
%O A258810 1,2
%A A258810 _Vincenzo Librandi_, Jun 11 2015