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%I #4 Mar 30 2012 18:50:48
%S 1,2,5,7,3,13,10,19,23,11,6,30,41,14,17,47,26,57,15,61,21,29,34,66,39,
%T 22,71,33,87,46,94,31,102,35,42,55,110,115,62,37,43,123,51,38,139,151,
%U 65,77,53,158,70,170,82,86,58,178,78,59,93,83,190,195,69,206,74,101,213
%N a(n) = the unique squarefree m such that A100113(A100112(m))=A005117(n).
%C a(A100112(n)) and A100113(A100112(n)) define a pair of inverse permutations of the squarefree numbers: a(A100112(A100113(n))) = A100113(A100112(a(n))) = A005117(n);
%C A100116(n) = if n is squarefree then a(A100112(n)) else n.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Squarefree.html">Squarefree</a>
%K nonn
%O 1,2
%A _Reinhard Zumkeller_, Nov 07 2004
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