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 A081529 #3 Apr 03 2014 11:35:04 %S A081529 1,1,2,3,12,10,60,105,280,252,2520,2310,27720,25740,24024,45045, %T A081529 720720,680680,12252240,11639628,11085360,10581480,232792560, %U A081529 223092870,1070845776,1029659400,2974571600,2868336900 %N A081529 Duplicate of A002944. %F A081529 Equals A003418(n) / n - _Martin Fuller_, Jan 03 2006 %Y A081529 Cf. A003418. %K A081529 dead %O A081529 1,3 %E A081529 More terms from _Martin Fuller_, Jan 03 2006