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 A119634 #22 Sep 08 2022 08:45:25
%S A119634 1,6,30,420,1260,13860,180180,360360,6126120,116396280,116396280,
%T A119634 2677114440,13385572200,40156716600,1164544781400,72201776446800,
%U A119634 72201776446800,72201776446800,2671465728531600,2671465728531600
%N A119634 a(n) = lcm(1,...,2n+2)/2.
%H A119634 Vaclav Kotesovec, <a href="/A119634/b119634.txt">Table of n, a(n) for n = 0..1000</a>
%H A119634 Vaclav Kotesovec, <a href="/A119634/a119634.jpg">Plot of log(a(n))/n for n = 1..10000</a>
%t A119634 Table[LCM @@ Range[2*n + 2]/2, {n, 0, 20}] (* _Vaclav Kotesovec_, Mar 04 2019 *)
%o A119634 (GAP) List([0..20],n->Lcm(List([1..2*n+2]))/2); # _Muniru A Asiru_, Mar 04 2019
%o A119634 (PARI) {a(n) = lcm(vector(2*n+2, i, i))/2}; \\ _G. C. Greubel_, Mar 05 2019
%o A119634 (Magma) [LCM([1..2*n+2])/2: n in [0..20]]; // _G. C. Greubel_, Mar 05 2019
%o A119634 (Sage) [lcm(range(1,2*n+3))/2 for n in (0..20)] # _G. C. Greubel_, Mar 05 2019
%Y A119634 Cf. A003418.
%Y A119634 Column k=0 of A120101.
%K A119634 nonn
%O A119634 0,2
%A A119634 _Paul Barry_, Jun 09 2006