%I A137753
%S A137753 1,1,2,1,2,1,3,1,6,5,3,1,4,1,12,7,12,7,4,1,5,1,20,9,30,31,20,9,5,1,6,1,
%T A137753 30,11,60,49,60,49,30,11,6,1,7,1,42,13,105,71,140,209,105,71,42,13,7,1,
%U A137753 8,1,56,15,168,97,280,351,280,351,168,97
%N A137753 First denominator and then numerator (left to right) of Leibniz's harmonic-like 
               triangle.
%e A137753 1/1; 1/2, 1/2; 1/3, 5/6, 1/3; 1/4, 7/12, 7/12, 1/4; 1/5, 9/20, 31/30, 
               9/20, 1/5;
%Y A137753 Cf. A003506; A007622; A046201; A046204; A046205; A046206; A046208; A046212; 
               A137752.
%Y A137753 Cf. A137752
%Y A137753 Sequence in context: A138224 A046205 A046206 this_sequence A134780 A154819 
               A104145
%Y A137753 Adjacent sequences: A137750 A137751 A137752 this_sequence A137754 A137755 
               A137756
%K A137753 frac,nonn,tabl
%O A137753 1,3
%A A137753 Mohammad K. Azarian (azarian(AT)evansville.edu), Feb 10 2008