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 A153497 #12 Aug 18 2016 05:35:15
%S A153497 1,7,21,73,341,1453,5461,21157,87381,354997,1398101,5548693,22369621,
%T A153497 89828053,357913941,1428859477,5726623061,22928862037,91625968981,
%U A153497 366324918613,1466015503701,5865493671253,23456248059221,93813538989397
%N A153497 a(n) is the number whose binary expansion is A153498(n).
%H A153497 G. C. Greubel, <a href="/A153497/b153497.txt">Table of n, a(n) for n = 1..500</a>
%H A153497 <a href="/index/Rec#order_06">Index entries for linear recurrences with constant coefficients</a>, signature (5, -14, 50, -56, 80, -64).
%F A153497 From _R. J. Mathar_, Feb 20 2009: (Start)
%F A153497 a(n) = 5*a(n-1) - 14*a(n-2) + 50*a(n-3) - 56*a(n-4) + 80*a(n-5) - 64*a(n-6).
%F A153497 G.f.: x*(1 +2x +16x^3 -24x^4 +32x^5)/((1-x)*(1-4x)*(1+2x^2)*(1+8x^2)). (End)
%t A153497 LinearRecurrence[{5,-14,50,-56,80,-64},{1,7,21,73,341,1453},30] (* _Harvey P. Dale_, Nov 21 2012 *)
%Y A153497 Cf. A135576, A153498, A153499, A153500.
%K A153497 easy,nonn
%O A153497 1,2
%A A153497 _Omar E. Pol_, Dec 27 2008
%E A153497 More terms from _R. J. Mathar_, Feb 20 2009