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%I #6 Jan 03 2017 02:25:57
%S 0,1,0,3,0,4,0,5,7,8,0,10,0,9,0,15,0,14,0,16,13,11,0,20,0,21,19,26,0,
%T 24,0,17,25,32,0,28,0,27,35,34,0,36,0,33,39,23,0,40,43,44,0,45,0,38,
%U 41,52,37,29,0,48,0,31,57,51,0,50,0,64,0,56,0,70,0,63,55,74,61,72,0,68,0
%N Greatest k < n such that phi(k) = phi(n) if such k exists, otherwise 0.
%Y Cf. A000010, A015126, A028476, A043343, A066659.
%K nonn
%O 1,4
%A _Vladeta Jovovic_, Jan 14 2002
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