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 A137244 #15 Jun 12 2022 17:17:55
%S A137244 2,2,6,42,1050,127050,13086150,65967282150,2659866783570150,
%T A137244 13594579130827036650,4484729304047661947505150,
%U A137244 179016047168539016473835519025150,85748973198421705721932588223712809265150,533960639770963461900374948788827304744234574385150
%N A137244 a(n) = lcm_{k=0..n} (k! + 1).
%C A137244 I came upon this sequence in an attempt to solve an open Erdős problem: Show that Sum_{k>=0} 1/(k!+1) is rational/irrational/transcendental.
%H A137244 Harvey P. Dale, <a href="/A137244/b137244.txt">Table of n, a(n) for n = 0..43</a>
%F A137244 a(n) = lcm_{k=0..n} (k! + 1).
%t A137244 With[{t=Range[0,20]!+1},Table[LCM@@Take[t,n],{n,Length[t]}]] (* _Harvey P. Dale_, Dec 21 2015 *)
%o A137244 (PARI) a(n) = {lc = 1; for (k=0, n, lc = lcm(lc, k!+1);); return (lc);} \\ _Michel Marcus_, Jul 25 2013
%Y A137244 Cf. A038507, A000142.
%K A137244 easy,nonn
%O A137244 0,1
%A A137244 _Karl Levy_, Mar 09 2008
%E A137244 More terms from _Harvey P. Dale_, Dec 21 2015