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 A089879 #5 Mar 31 2012 14:02:18 %S A089879 1,1,2,6,6,6,24,144,3024,232848,3027024,56786343373599840 %N A089879 Least common multiple of all cycle sizes in range [A014137(n-1)..A014138(n-1)] of permutation A071667/A071668. %H A089879 A. Karttunen, <a href="/A089408/a089408.c.txt">C-program for computing the initial terms of this sequence</a> %K A089879 nonn %O A089879 0,3 %A A089879 _Antti Karttunen_, Nov 29 2003