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 A119636 #14 Sep 08 2022 08:45:25
%S A119636 6,5,14,9,22,65,30,119,532,126,690,825,594,4147,62062,15015,3640,
%T A119636 32708,7956,79458,833340,203490,2337874,4004231,980628,12738550,
%U A119636 3124550,766935,11113830,166613265,81940950
%N A119636 a(n) = lcm(1,...,2n+4)/((n+1)*binomial(2n+2, n+1)).
%C A119636 Subdiagonal of A120101.
%H A119636 Muniru A Asiru, <a href="/A119636/b119636.txt">Table of n, a(n) for n = 0..3000</a>
%t A119636 Table[LCM@@Range[2n+4]/((n+1)Binomial[2n+2,n+1]),{n,0,30}] (* _Harvey P. Dale_, Jun 08 2018 *)
%o A119636 (GAP) List([0..40],n->Lcm(List([1..2*n+4]))/((n+1)*Binomial(2*n+2,n+1))); # _Muniru A Asiru_, Mar 04 2019
%o A119636 (Sage) [lcm(range(1, 2*(n+2)+1))/((n+1)*binomial(2*n+2, n+1)) for n in (0..40)] # _G. C. Greubel_, Mar 04 2019
%o A119636 (Magma) [Lcm([1..2*n+4])/((n+1)*Binomial(2*n+2, n+1)): n in [0..40]]; // _G. C. Greubel_, Mar 04 2019
%Y A119636 Cf. A068553.
%K A119636 easy,nonn
%O A119636 0,1
%A A119636 _Paul Barry_, Jun 09 2006