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 A024080 #11 Sep 08 2022 08:44:48 %S A024080 1,6,17,100,1377,13682,109873,806736,5732033,40294558,282375249, %T A024080 1977165692,13841038369,96888639114,678222535025,4747560750568, %U A024080 33232929521025,232630512567350,1628413596020881,11398895182897044 %N A024080 a(n) = 7^n - n^5. %H A024080 Vincenzo Librandi, <a href="/A024080/b024080.txt">Table of n, a(n) for n = 0..500</a> %F A024080 From _Chai Wah Wu_, Jul 10 2016: (Start) %F A024080 a(n) = 13*a(n-1) - 57*a(n-2) + 125*a(n-3) - 155*a(n-4) + 111*a(n-5) - 43*a(n-6) + 7*a(n-7) for n > 6. %F A024080 G.f.: (-8*x^6 - 175*x^5 - 451*x^4 - 96*x^3 + 4*x^2 + 7*x - 1)/((x - 1)^6*(7*x - 1)). (End) %o A024080 (Magma) [7^n-n^5: n in [0..25]]; // _Vincenzo Librandi_, Jul 03 2011 %K A024080 nonn,easy %O A024080 0,2 %A A024080 _N. J. A. Sloane_