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 A139183 #13 Sep 08 2022 08:45:33
%S A139183 2,14,89,629,5039,45359,453599,4989599,59875199,778377599,10897286399,
%T A139183 163459295999,2615348735999,44460928511999,800296713215999,
%U A139183 15205637551103999,304112751022079999
%N A139183 a(n) = (n! - 8)/8.
%C A139183 Original name: Natural numbers of the form (n!-8)/8.
%H A139183 Vincenzo Librandi, <a href="/A139183/b139183.txt">Table of n, a(n) for n = 4..300</a>
%p A139183 seq((factorial(n)-8)/8,n=4..25); # _Muniru A Asiru_, Oct 20 2018
%t A139183 Table[(n! - 8)/8, {n, 4, 20}]
%o A139183 (Magma) [(Factorial(n)-8)/8: n in [4..25]]; // _Vincenzo Librandi_, Jul 20 2011
%o A139183 (GAP) List([4..25],n->(Factorial(n)-8)/8); # _Muniru A Asiru_, Oct 20 2018
%Y A139183 Cf. A033312, A139172, A139173, A139174, A139175, A139176, A139177, A139183, A139184.
%K A139183 nonn
%O A139183 4,1
%A A139183 _Artur Jasinski_, Apr 11 2008
%E A139183 New name from _Jon E. Schoenfield_, Oct 19 2018