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 A017140 #18 Jul 08 2025 06:02:15
%S A017140 1296,38416,234256,810000,2085136,4477456,8503056,14776336,24010000,
%T A017140 37015056,54700816,78074896,108243216,146410000,193877776,252047376,
%U A017140 322417936,406586896,506250000,623201296
%N A017140 a(n) = (8*n+6)^4.
%H A017140 Vincenzo Librandi, <a href="/A017140/b017140.txt">Table of n, a(n) for n = 0..10000</a>
%H A017140 <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (5,-10,10,-5,1).
%F A017140 G.f.: ( -1296-31936*x-55136*x^2-9920*x^3-16*x^4 ) / (x-1)^5. - _R. J. Mathar_, Aug 26 2015
%F A017140 a(n) = 16*A016840(n). - _R. J. Mathar_, Aug 26 2015
%t A017140 (8*Range[0,20]+6)^4 (* or *) LinearRecurrence[{5,-10,10,-5,1},{1296,38416,234256,810000,2085136},20] (* _Harvey P. Dale_, Sep 21 2021 *)
%o A017140 (Magma) [(8*n+6)^4: n in [0..35]]; // _Vincenzo Librandi_, Jul 22 2011
%K A017140 nonn,easy
%O A017140 0,1
%A A017140 _N. J. A. Sloane_