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 A165231 #18 Mar 04 2024 01:11:22
%S A165231 1,8,120,1856,28736,444928,6888960,106663936,1651511296,25570869248,
%T A165231 395921817600,6130182127616,94915539501056,1469607174995968,
%U A165231 22754390483927040,352313390342864896,5454979121614422016
%N A165231 a(0)=1, a(1)=8, a(n)=16*a(n-1)-8*a(n-2) for n>1 .
%H A165231 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (16, -8).
%F A165231 G.f.: (1-8*x)/(1-16*x+8x^2) .
%t A165231 LinearRecurrence[{16,-8},{1,8},30] (* _Harvey P. Dale_, Jul 04 2011 *)
%K A165231 nonn
%O A165231 0,2
%A A165231 _Philippe Deléham_, Sep 09 2009