%I #5 Mar 30 2012 18:39:16
%S 1,2,4,3,5,5,7,7,6,8,15,7,10,10,9,8,11,10,11,14,13,14,13,11,12,15,16,
%T 20,21,13,14,14,17,13,16,16,16,17,17,17,20,16,20,22,26,19,13,15,19,21,
%U 21,25,21,21,21,21,25,25,27,31,27,20,22,26,28,20,21,17,21,23,24,22,22,22
%N A065560(n) + n - prime(n).
%C Conjecture : a(n)>0
%K nonn
%O 1,2
%A _Benoit Cloitre_, Apr 06 2003