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 A139189 #13 Sep 08 2022 08:45:33
%S A139189 1,5,119,5039,39916799,6227020799,355687428095999,121645100408831999,
%T A139189 25852016738884976639999,8841761993739701954543615999999,
%U A139189 8222838654177922817725562879999999,13763753091226345046315979581580902399999999,33452526613163807108170062053440751665151999999999,60415263063373835637355132068513997507264511999999999,258623241511168180642964355153611979969197632389119999999999,4274883284060025564298013753389399649690343788366813724671999999999999,138683118545689835737939019720389406345902876772687432540821294940159999999999999
%N A139189 a(n) = prime(n)!-1.
%C A139189 Numbers of the form (prime(n)!-m)/m :
%C A139189 for m=1 see A139189
%C A139189 for m=2 see A139190
%C A139189 for m=3 see A139191
%C A139189 for m=4 see A139192
%C A139189 for m=5 see A139193
%C A139189 for m=6 see A139194
%C A139189 for m=7 see A139195
%C A139189 for m=8 see A139196
%C A139189 for m=9 see A139197
%C A139189 for m=10 see A139198
%H A139189 Alois P. Heinz, <a href="/A139189/b139189.txt">Table of n, a(n) for n = 1..85</a>
%F A139189 a(n)=A039716(n)-1. - _R. J. Mathar_, May 25 2008
%t A139189 Table[(Prime[n]! - 1)/1, {n, 1, 20}]
%o A139189 (PARI) a(n) = prime(n)!-1 \\ _Charles R Greathouse IV_, Apr 29 2015
%o A139189 (Magma) [(Factorial(NthPrime(n))-1): n in [1..20]]; // _Vincenzo Librandi_, Jun 02 2017
%Y A139189 Cf. A139189, A139190, A139191, A139192, A139193, A139194, A139195, A139196, A139197, A139198.
%K A139189 nonn
%O A139189 1,2
%A A139189 _Artur Jasinski_, Apr 11 2008
%E A139189 More terms from _R. J. Mathar_, May 25 2008