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 A024030 #12 Jan 22 2024 22:38:20
%S A024030 1,2,-119,-2160,-16303,-77882,-279207,-821356,-2090591,-4763286,
%T A024030 -9940951,-19310024,-35300367,-61154194,-100630535,-156510468,
%U A024030 -225388735,-281198510,-224799543,268389728,2206784401
%N A024030 a(n) = 3^n - n^7.
%H A024030 Vincenzo Librandi, <a href="/A024030/b024030.txt">Table of n, a(n) for n = 0..200</a>
%t A024030 Table[3^n-n^7,{n,0,20}] (* _Harvey P. Dale_, Jan 22 2024 *)
%o A024030 (Magma) [3^n-n^7: n in [0..35]]; // _Vincenzo Librandi_, May 13 2011
%K A024030 sign
%O A024030 0,2
%A A024030 _N. J. A. Sloane_