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 A089415 #5 Mar 31 2012 14:02:17 %S A089415 1,1,2,6,12,870,13580,10962,20425900,1127689920 %N A089415 Least common multiple of all cycle sizes in range [A014137(n-1)..A014138(n-1)] of permutation A071655/A071656. %H A089415 A. Karttunen, <a href="/A089408/a089408.c.txt">C-program for computing the initial terms of this sequence</a> %K A089415 nonn %O A089415 0,3 %A A089415 _Antti Karttunen_, Nov 29 2003