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 A054607 #24 Jul 11 2021 04:43:55
%S A054607 0,8,288,6672,65840,391320,1681008,5767328,16781472,43053480,
%T A054607 100010240,214373808,430002768,815759672,1475827920,2562941760,
%U A054607 4295033408,6975841608,11020066272,16983694160,25600160880,37823054808,54876108848
%N A054607 a(n) = Sum_{d|8} phi(d)*n^(8/d).
%H A054607 Seiichi Manyama, <a href="/A054607/b054607.txt">Table of n, a(n) for n = 0..10000</a>
%H A054607 <a href="/index/Rec#order_09">Index entries for linear recurrences with constant coefficients</a>, signature (9,-36,84,-126,126,-84,36,-9,1).
%F A054607 G.f.: -8*x*(34*x^6+525*x^5+1971*x^4+1936*x^3+546*x^2+27*x+1) / (x-1)^9. [_Colin Barker_, Dec 21 2012]
%F A054607 a(n) = n^8 + n^4 + 2*n^2 + 4*n. - _Seiichi Manyama_, Jul 11 2021
%o A054607 (PARI) a(n) = n^8+n^4+2*n^2+4*n; \\ _Seiichi Manyama_, Jul 11 2021
%Y A054607 Row n=8 of A185651.
%K A054607 nonn,easy
%O A054607 0,2
%A A054607 _N. J. A. Sloane_, Apr 16 2000