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 A139550 #19 Jan 12 2024 13:56:00
%S A139550 1,1,1,1,2,2,6,6,12,12,60,60,60,60,420,420,840,840,2520,2520,2520,
%T A139550 2520,27720,27720,27720,27720,360360,360360,360360,360360,360360,
%U A139550 360360,720720,720720,12252240,12252240,12252240,12252240,232792560,232792560
%N A139550 a(n) = lcm(1..floor(n/2)).
%C A139550 Row products of A139549.
%F A139550 a(n) = A003418(floor(n/2)) = A366368(n) / A003418(n) = A003418(n) / A366369(n). - _Max Alekseyev_, Oct 08 2023
%p A139550 LCM := proc (n) local i; ilcm(seq(i,i=1..n)) end; A139550 := n -> LCM(n/2); seq(A139550(n),n=0..40); # _Peter Luschny_, Jun 09 2011
%t A139550 Join[{1,1},Table[LCM@@Range[Floor[n/2]],{n,2,40}]] (* _Harvey P. Dale_, Jan 12 2024 *)
%Y A139550 Cf. A139549, A003418, A366368, A366369.
%K A139550 nonn
%O A139550 0,5
%A A139550 _Mats Granvik_, Apr 27 2008
%E A139550 Offset corrected by _Peter Luschny_, Jun 09 2011