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 A173316 #13 Dec 03 2024 19:55:44
%S A173316 5,5,11,35,143,719,4319,30239,241919,2177279,21772799,239500799,
%T A173316 2874009599,37362124799,523069747199,7846046207999,125536739327999,
%U A173316 2134124568575999,38414242234367999,729870602452991999,14597412049059839999,306545653030256639999
%N A173316 a(n) = 6*n! - 1.
%H A173316 Vincenzo Librandi, <a href="/A173316/b173316.txt">Table of n, a(n) for n = 0..200</a>
%F A173316 a(0)=5, a(n) = n*a(n-1)+n-1. - _Vincenzo Librandi_, Sep 30 2013
%t A173316 Table[6 n! - 1, {n, 0, 25}] (* _Vincenzo Librandi_, Sep 30 2013 *)
%o A173316 (Magma) [6*Factorial(n)-1: n in [0..25]]; // _Vincenzo Librandi_, Sep 30 2013
%o A173316 (Magma) [5] cat [n eq 1 select n+4 else n*Self(n-1)+n-1: n in [1..25] ]; // _Vincenzo Librandi_, Sep 30 2013
%Y A173316 Cf. sequences of the type k*n!-1: A033312 (k=1), A020543 (k=2), A173323 (k=3), A173321 (k=4), A173317 (k=5).
%K A173316 nonn,easy
%O A173316 0,1
%A A173316 _Vincenzo Librandi_, Feb 16 2010