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 A139184 #12 Sep 08 2022 08:45:33
%S A139184 79,559,4479,40319,403199,4435199,53222399,691891199,9686476799,
%T A139184 145297151999,2324754431999,39520825343999,711374856191999,
%U A139184 13516122267647999,270322445352959999,5676771352412159999,124888969753067519999
%N A139184 a(n) = (n! - 9)/9.
%C A139184 Original name: Natural numbers of the form (n!-9)/9.
%H A139184 Vincenzo Librandi, <a href="/A139184/b139184.txt">Table of n, a(n) for n = 6..300</a>
%p A139184 seq((factorial(n)-9)/9,n=6..25); # _Muniru A Asiru_, Oct 20 2018
%t A139184 Table[(n! - 9)/9, {n, 6, 20}]
%o A139184 (Magma) [(Factorial(n)-9)/9: n in [6..25]]; // _Vincenzo Librandi_, Jul 20 2011
%o A139184 (GAP) List([6..25],n->(Factorial(n)-9)/9); # _Muniru A Asiru_, Oct 20 2018
%Y A139184 Cf. A033312, A139172, A139173, A139174, A139175, A139176, A139177, A139183, A139184.
%K A139184 nonn,easy
%O A139184 6,1
%A A139184 _Artur Jasinski_, Apr 11 2008
%E A139184 New name from _Jon E. Schoenfield_, Oct 19 2018