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 A017025 #12 Sep 08 2022 08:44:41 %S A017025 19683,1000000000,118587876497,2641807540224,26439622160671, %T A017025 165216101262848,756680642578125,2779905883635712,8662995818654939, %U A017025 23762680013799936,58871586708267913,134217728000000000 %N A017025 a(n) = (7*n + 3)^9. %H A017025 Vincenzo Librandi, <a href="/A017025/b017025.txt">Table of n, a(n) for n = 0..10000</a> %H A017025 <a href="/index/Rec#order_10">Index entries for linear recurrences with constant coefficients</a>, signature (10, -45, 120, -210, 252, -210, 120, -45, 10, -1). %o A017025 (Magma) [(7*n+3)^9: n in [0..20]]; // _Vincenzo Librandi_, Jul 14 2011 %K A017025 nonn,easy %O A017025 0,1 %A A017025 _N. J. A. Sloane_