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 A146084 #26 Mar 03 2024 14:46:10
%S A146084 1,1,-11,-23,109,385,-923,-5543,5533,72049,5653,-858935,-926771,
%T A146084 9380449,20501701,-92063687,-338084099,766680145,4823689333,
%U A146084 -4376472407,-62260744403,-9743075519,737385857317,854302763545,-7994327524259
%N A146084 Expansion of 1/(1-x(1-12x)).
%C A146084 Row sums of Riordan array (1,x(1-12x)).
%H A146084 G. C. Greubel, <a href="/A146084/b146084.txt">Table of n, a(n) for n = 0..1000</a>
%H A146084 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (1, -12).
%F A146084 a(n) = a(n-1)-12*a(n-2), a(0)=1, a(1)=1.
%F A146084 a(n) = Sum_{k, 0<=k<=n} A109466(n,k)*12^(n-k).
%t A146084 LinearRecurrence[{1, -12}, {1, 1}, 100] (* _G. C. Greubel_, Jan 30 2016 *)
%o A146084 (Sage) [lucas_number1(n,1,12) for n in range(1, 26)] # _Zerinvary Lajos_, Apr 22 2009
%o A146084 (PARI) Vec(1/(1-x*(1-12*x))+O(x^99)) \\ _Charles R Greathouse IV_, Sep 26 2012
%Y A146084 Cf. A010892, A107920, A106852, A106853, A106854, A145934, A145976, A145978, A146078, A146080, A146083
%K A146084 sign,easy
%O A146084 0,3
%A A146084 _Philippe Deléham_, Oct 27 2008