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%I #2 Mar 30 2012 18:52:35
%S 1,3,6,10,13,15,19,21,24,27,29,32,35,38,41,43,47,51,54,56,59,61,63,66,
%T 69,71,74,76,78,82,85,90,93,96,100,102,104,107,110,114,116,118,121,
%U 124,126,129,131,135,137,140,144,146,149,151,153,157,160,163,165,168,171
%N n-th squarefree number plus n-th non-single or nonisolated number.
%F a(n)=A005117(n)+A167707(n).
%K nonn
%O 1,2
%A _Juri-Stepan Gerasimov_, Nov 21 2009
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