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 A196412 #13 Aug 08 2023 14:10:19
%S A196412 1,0,-30,-237,-1000,-3005,-7056,-11767,7552,303831,3528800,39755749,
%T A196412 478752768,6226649507,87177753376,1307673608625,20922788839424,
%U A196412 355687426676143,6402373703838432,121645100406355901,2432902008173440000
%N A196412 a(n) = n! - n^5.
%H A196412 Vincenzo Librandi, <a href="/A196412/b196412.txt">Table of n, a(n) for n = 0..400</a>
%t A196412 Table[n!-n^5,{n,0,20}] (* _Harvey P. Dale_, Nov 03 2015 *)
%o A196412 (Magma) [Factorial(n)-n^5: n in [0..20]]
%o A196412 (PARI) a(n)=n!-n^5 \\ _Charles R Greathouse IV_, Nov 21 2011
%Y A196412 Cf. A005008, A005096, A007339, A144768, A196411.
%K A196412 sign,easy,less
%O A196412 0,3
%A A196412 _Vincenzo Librandi_, Oct 06 2011