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 A093453 #19 Apr 13 2018 04:27:14
%S A093453 1,1,2,2,6,24,48,720,720,1440,241920,120960,3628800,14515200,87091200,
%T A093453 958003200,261273600,2615348736000,804722688000,125536739328000,
%U A093453 2414168064000,753220435968000,256094948229120000,22596613079040000,102181884343418880000
%N A093453 1/1, 2*3/lcm(2,3), 4*5*6/lcm(4,5,6), 7*8*9*10/lcm(7,8,9,10), ...
%F A093453 a(n) = (Product_{j=n*(n-1)/2+1..n*(n+1)/2} j) / lcm(n*(n-1)/2+1, n*(n-1)/2+2, ..., n*(n+1)/2). - _Jon E. Schoenfield_, Mar 17 2018
%F A093453 a(n) = A057003(n)/A061431(n). - _Michel Marcus_, Apr 12 2018
%e A093453 a(5) = 6 = (11*12*13*14*15)/lcm(11,12,13,14,15) = 360360/60060.
%p A093453 a:=n->product(j,j=n*(n-1)/2+1..n*(n+1)/2)/lcm(seq(j,j=n*(n-1)/2+1..n*(n+1)/2)): seq(a(n),n=1..27); # _Emeric Deutsch_, Aug 07 2005
%Y A093453 Cf. A000217, A057003, A061431.
%K A093453 nonn
%O A093453 1,3
%A A093453 _Amarnath Murthy_, Apr 03 2004
%E A093453 More terms from _Emeric Deutsch_, Aug 07 2005