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 A089875 #5 Mar 31 2012 14:02:17 %S A089875 1,1,1,3,3,15,30,180,3780,291060,3783780,70982929216999800 %N A089875 Least common multiple of all cycle sizes in range [A014137(n-1)..A014138(n-1)] of permutation A071665/A071666. %H A089875 A. Karttunen, <a href="/A089408/a089408.c.txt">C-program for computing the initial terms of this sequence</a> %Y A089875 Cf. A089403. %K A089875 nonn %O A089875 0,4 %A A089875 _Antti Karttunen_, Nov 29 2003