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 A120709 #2 Mar 31 2012 14:02:29 %S A120709 1,1,2,6,8,120,18480,314954640,29650259293200, %T A120709 806144692105283180937910919057361600, %U A120709 116647824244848662624579303522985859096483200,3116996669196650347010384586809853826278378997194387292312487616560888473194736151916402811882584000 %N A120709 Least common multiple of all cycle sizes in range [A014137(n-1)..A014138(n-1)] of permutation A120705/A120706. %K A120709 nonn %O A120709 0,3 %A A120709 _Antti Karttunen_, Jun 28 2006