%I A064167
%S A064167 1,6,66,300,8220,980,50820,213080,17965080,18600120,2320468920,
%T A064167 2384502120,412970037480,422245703880,430902992520,1756076802480
%N A064167 Product of numerator and denominator of the n-th harmonic number, 1 + 
               1/2 + 1/3 +...+ 1/n.
%C A064167 Numerator and denominator in definition have no common divisors >1.
%H A064167 Leroy Quet, <a href="http://www.prism-of-spirals.net/">Home Page</a> 
               (listed in lieu of email address)
%e A064167 The 3rd harmonic number is 11/6. So a(3) = 11 * 6 = 66.
%Y A064167 Sequence in context: A045641 A071276 A119172 this_sequence A119073 A028559 
               A163699
%Y A064167 Adjacent sequences: A064164 A064165 A064166 this_sequence A064168 A064169 
               A064170
%K A064167 nonn
%O A064167 1,2
%A A064167 Leroy Quet Sep 19 2001