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Numbers n which occur at least twice in A001600.
1

%I #5 Mar 30 2012 19:01:05

%S 5,13,15,17,19,24,27,29,37,44,45,46,47,49,51,53,61,73,75,85,86,87,89,

%T 91,96,97,99,101,105,107,144,145,149,168,169,171,173,176,181,184,186,

%U 187,188,189,191,195,197,203,205,224,240,245,252,264,270,272

%N Numbers n which occur at least twice in A001600.

%D T. Goto and S. Shibata, All numbers whose positive divisors have integral harmonic mean up to 300, Math. Comput. 73 (2004), 475-491.

%Y Cf. A001600, A090240.

%K nonn

%O 1,1

%A _R. K. Guy_, Feb 08 2004