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 A174766 #13 Sep 08 2022 08:45:51
%S A174766 0,42,16548,6519870,2568812232,1012105499538,398766998005740,
%T A174766 157113185108762022,61902196165854230928,24389308176161458223610,
%U A174766 9609325519211448685871412,3786049865261134620775112718
%N A174766 y-values in the solution to x^2 - 22*y^2 = 1.
%C A174766 The corresponding values of x of this Pell equation are in A114050.
%H A174766 Vincenzo Librandi, <a href="/A174766/b174766.txt">Table of n, a(n) for n = 1..200</a>
%H A174766 <a href="/index/Rec">Index entries for linear recurrences with constant coefficients</a>, signature (394,-1).
%F A174766 a(n) = 394*a(n-1)-a(n-2) with a(1)=0, a(2)=42.
%F A174766 G.f.: 42*x^2/(1-394*x+x^2).
%t A174766 LinearRecurrence[{394,-1},{0,42},30]
%o A174766 (Magma) I:=[0, 42]; [n le 2 select I[n] else 394*Self(n-1)-Self(n-2): n in [1..20]];
%Y A174766 Cf. A114050.
%K A174766 nonn,easy
%O A174766 1,2
%A A174766 _Vincenzo Librandi_, Apr 14 2010