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 A024081 #14 Jul 08 2025 17:27:17
%S A024081 1,6,-15,-386,-1695,1182,70993,705894,5502657,39822166,281475249,
%T A024081 1975555182,13838301217,96884183598,678215543313,4747550119318,
%U A024081 33232913792385,232630489849638,1628413563898225,11398895138327262
%N A024081 a(n) = 7^n - n^6.
%H A024081 Vincenzo Librandi, <a href="/A024081/b024081.txt">Table of n, a(n) for n = 0..400</a>
%H A024081 <a href="/index/Rec#order_08">Index entries for linear recurrences with constant coefficients</a>, signature (14,-70,182,-280,266,-154,50,-7).
%t A024081 Table[7^n-n^6,{n,0,30}] (* _Harvey P. Dale_, May 28 2019 *)
%o A024081 (Magma) [7^n-n^6: n in [0..20]]; // Vincenzo Librandi, Jul 2011
%K A024081 sign,easy
%O A024081 0,2
%A A024081 _N. J. A. Sloane_