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 A168660 #17 Mar 24 2025 09:27:35
%S A168660 0,1,576,30618,532480,4921875,30373056,141649396,537919488,1745783685,
%T A168660 5005000000,12978455886,30976598016,68960620183,144680034240,
%U A168660 288410625000,549890031616,1008202119561,1785539723328,3065980064770
%N A168660 a(n) = n^7*(n^3 + 1)/2.
%H A168660 Vincenzo Librandi, <a href="/A168660/b168660.txt">Table of n, a(n) for n = 0..10000</a>
%H A168660 <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 A168660 From _G. C. Greubel_, Jul 28 2016: (Start)
%F A168660 G.f.: x*(1 + 565*x + 24337*x^2 + 227197*x^3 + 653875*x^4 + 656479*x^5 + 227995*x^6 + 23503*x^7 + 448*x^8)/(1 - x)^11.
%F A168660 E.g.f.: (1/2)*x*(2 + 574*x + 9631*x^2 + 34455*x^3 + 42665*x^4 + 22848*x^5 + 5881*x^6 + 750*x^7 + 45*x^8 + x^9)*exp(x). (End)
%t A168660 Table[n^7*(n^3 + 1)/2, {n,0,50}] (* _G. C. Greubel_, Jul 28 2016 *)
%o A168660 (Magma) [n^7*(n^3+1)/2: n in [0..20]]; // _Vincenzo Librandi_, Aug 28 2011
%o A168660 (PARI) a(n)=n^7*(n^3+1)/2 \\ _Charles R Greathouse IV_, Jul 29 2016
%o A168660 (SageMath)
%o A168660 def A168660(n): return n^4*binomial(n^3+1,2)
%o A168660 print([A168660(n) for n in range(31)]) # _G. C. Greubel_, Mar 23 2025
%Y A168660 Cf. A168635.
%K A168660 nonn,easy
%O A168660 0,3
%A A168660 _N. J. A. Sloane_, Dec 11 2009