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 A229828 #14 Mar 01 2025 22:49:56
%S A229828 6,6,13,41,167,839,5039,35279,282239,2540159,25401599,279417599,
%T A229828 3353011199,43589145599,610248038399,9153720575999,146459529215999,
%U A229828 2489811996671999,44816615940095999,851515702861823999,17030314057236479999,357636595201966079999
%N A229828 a(n) = 7*n! - 1.
%H A229828 Vincenzo Librandi, <a href="/A229828/b229828.txt">Table of n, a(n) for n = 0..200</a>
%F A229828 a(0)=6, a(n) = n*a(n-1)+n-1.
%t A229828 Table[7 n! - 1, {n, 0, 25}]
%o A229828 (Magma) [7*Factorial(n)-1: n in [0..25]];
%o A229828 (Magma) [6] cat [n eq 1 select n+5 else n*Self(n-1)+n-1: n in [1..25] ];
%Y A229828 Cf. sequences of the type k*n!-1: A033312 (k=1), A020543 (k=2), A173323 (k=3), A173321 (k=4), A173317 (k=5), A173316 (k=6).
%K A229828 nonn,easy
%O A229828 0,1
%A A229828 _Vincenzo Librandi_, Sep 30 2013