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 A127280 #2 Mar 31 2012 13:21:13 %S A127280 1,1,2,3,4,168,360,465585120,4122326466720,217481422952137966221600, %T A127280 423596249162987984485389187200, %U A127280 2601085547436195054585834389287071368256718712872622796333077962782445499276184000 %N A127280 Least common multiple of all cycle sizes in range [A014137(n-1)..A014138(n-1)] of permutation A126313/A126314. %C A127280 The sequence seems to give the least common multiples also for the permutation A126315/A126316, but with a(3)=6 instead of 3. %K A127280 nonn %O A127280 0,3 %A A127280 _Antti Karttunen_, Jan 16 2007