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 A251089 #5 Nov 30 2014 16:49:27 %S A251089 1,2,3,2,3,2,15,14,5,6,5,6,35,2,7,10,21,10,3,22,39,11,13,33,26,15,14, %T A251089 51,2,17,6,85,6,55,34,65,6,91,30,7,38,21,19,42,95,22,57,10,69,10,23,6, %U A251089 115,26,15,46,3,14,87,62,29,31,58,93,2,33,34,77,6,119 %N A251089 Squarefree kernel of A098550(n). %C A251089 a(n) = A007947(A098550(n)). %H A251089 Reinhard Zumkeller, <a href="/A251089/b251089.txt">Table of n, a(n) for n = 1..10000</a> %o A251089 (Haskell) %o A251089 a251089 = a007947 . fromIntegral . a098550 %Y A251089 Cf. A007947, A098550, A251090. %K A251089 nonn %O A251089 1,2 %A A251089 _Reinhard Zumkeller_, Nov 30 2014