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 A091827 #5 Mar 30 2012 18:39:22 %S A091827 6,6,12,20,20,24,36,45,48,48,60,60,72,72,72,72,80,90,90,120,120,120, %T A091827 120,120,120,120,120,120,144,144,144,144,144,180,180,180,180,180,180, %U A091827 180,180,240,240,240,240,240,240,240,240,240,240,240,240,240,240,360,360 %N A091827 Least k such that k^n divides A000254(k). %K A091827 nonn %O A091827 1,1 %A A091827 _Benoit Cloitre_, Mar 09 2004