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 A054609 #15 Mar 16 2018 10:34:59
%S A054609 0,10,1080,59340,1049680,9768870,60474120,282492280,1073774880,
%T A054609 3486843810,10000100440,25937586180,61917613680,137858863870,
%U A054609 289255193640,576651150960,1099512677440,2015995321530,3570469117560,6131068735420,10240003201680,16679885064150
%N A054609 a(n) = Sum_{d|10} phi(d)*n^(10/d).
%H A054609 T. D. Noe, <a href="/A054609/b054609.txt">Table of n, a(n) for n = 0..1000</a>
%H A054609 <a href="/index/Rec">Index entries for linear recurrences with constant coefficients</a>, signature (11,-55,165,-330,462,-462,330,-165,55,-11,1).
%F A054609 G.f.: -10*x*(100*x^8 +4783*x^7 +45547*x^6 +130963*x^5 +131119*x^4 +45469*x^3 +4801*x^2 +97*x +1) / (x -1)^11. [_Colin Barker_, Dec 21 2012]
%t A054609 Table[DivisorSum[10, EulerPhi[#] n^(10/#) &], {n, 0, 100}] (* _T. D. Noe_, Mar 27 2012 *)
%Y A054609 Row n=10 of A185651.
%K A054609 nonn,easy
%O A054609 0,2
%A A054609 _N. J. A. Sloane_, Apr 16 2000