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 A239610 #20 Jun 13 2015 00:55:00
%S A239610 0,1,131044,11309769,228735376,2258625625,14430255876,68689595569,
%T A239610 264286471744,865363202001,2496558002500,6503780163001,15577324963344,
%U A239610 34772403556969,73108895539876,145988618630625,278735579781376,511643454094369,907005861105444
%N A239610 Sin(arcsin(n) - 4 arccos(n))^2.
%C A239610 The terms are integers.
%C A239610 This is assuming the "standard branch" of arcsin and arccos, so that
%C A239610 sin(arccos(n)) = cos(arcsin(n)) = sqrt(1-n^2). - _Robert Israel_, May 25 2014
%H A239610 Colin Barker, <a href="/A239610/b239610.txt">Table of n, a(n) for n = 1..1000</a>
%H A239610 <a href="/index/Rec#order_11">Index entries for linear recurrences with constant coefficients</a>, signature (11,-55,165,-330,462,-462,330,-165,55,-11,1).
%F A239610 G.f.: -x^2*(x +1)*(x^8 +131032*x^7 +9737308*x^6 +101797864*x^5 +241153990*x^4 +101797864*x^3 +9737308*x^2 +131032*x +1) / (x -1)^11. - _Colin Barker_, May 24 2014
%F A239610 a(n) = n^2 (16*n^4 - 20*n^2 + 5)^2 = ChebyshevT(5,n)^2. - _Robert Israel_, May 25 2014
%t A239610 G[n_, a_, b_] := G[n, a, b] = Sin[a ArcSin[ n] + b ArcCos[n]]^2 // ComplexExpand // FullSimplify; Table[G[n, 1, -4], {n, 0, 43}]
%o A239610 (PARI) vector(100, n, round(sin(asin(n-1) - 4*acos(n-1))^2)) \\ _Colin Barker_, May 24 2014
%Y A239610 Cf. A239607, A239608, A239609.
%K A239610 nonn,easy
%O A239610 1,3
%A A239610 _José María Grau Ribas_, May 24 2014