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 A144768 #17 Sep 08 2022 08:45:38
%S A144768 1,0,-510,-19677,-262120,-1953005,-10076976,-40348567,-134177408,
%T A144768 -387057609,-996371200,-2318030891,-4680778752,-4377478573,
%U A144768 66517244416,1269231008625,20854070411264,355568840219503,6402175346437632,121644777721134221,2432901496176640000,51090941377429393419
%N A144768 a(n) = n! - n^9.
%H A144768 Vincenzo Librandi, <a href="/A144768/b144768.txt">Table of n, a(n) for n = 0..400</a>
%t A144768 lst={};k=9;Do[a=n!-n^k;AppendTo[lst,a],{n,k,29}];lst
%t A144768 Table[n!-n^9,{n,0,30}] (* _Harvey P. Dale_, Sep 18 2020 *)
%o A144768 (PARI) a(n)=n!-n^9 \\ _Charles R Greathouse IV_, Oct 05 2011
%o A144768 (Magma) [Factorial(n)-n^9: n in [0..20]]; // _Vincenzo Librandi_, Oct 06 2011
%K A144768 sign,easy
%O A144768 0,3
%A A144768 _Vladimir Joseph Stephan Orlovsky_, Sep 20 2008
%E A144768 Corrected offset from 9 to 0 and extended by _Vincenzo Librandi_, Oct 06 2011