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 A177095 #25 Sep 08 2022 08:45:53
%S A177095 1,73,721,6553,59041,531433,4782961,43046713,387420481,3486784393,
%T A177095 31381059601,282429536473,2541865828321,22876792454953,
%U A177095 205891132094641,1853020188851833,16677181699666561,150094635296999113
%N A177095 9^n - 8.
%H A177095 Vincenzo Librandi, <a href="/A177095/b177095.txt">Table of n, a(n) for n = 1..1000</a>
%H A177095 <a href="/index/Rec">Index entries for linear recurrences with constant coefficients</a>, signature (10,-9).
%F A177095 G.f.: x*(1 + 63*x)/(1 - 10*x + 9*x^2). - _Vincenzo Librandi_, Feb 06 2013
%F A177095 a(n) = 10*a(n-1) - 9*a(n-2) for n>2, a(1)=1, a(2)=73. - _Vincenzo Librandi_, Feb 06 2013
%t A177095 CoefficientList[Series[(1 + 63 x)/(1 - 10 x + 9 x^2), {x, 0, 30}], x] (* _Vincenzo Librandi_, Feb 06 2013 *)
%t A177095 LinearRecurrence[{10,-9},{1,73},20] (* _Harvey P. Dale_, May 22 2014 *)
%o A177095 (Magma) [9^n-8: n in [1..20]];
%Y A177095 Equals A001019(n)-8.
%K A177095 nonn,easy
%O A177095 1,2
%A A177095 _Vincenzo Librandi_, Nov 15 2010