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%I #8 Jun 22 2013 16:06:09
%S 1,1,1,2,1,2,1,3,5,6,1,3,1,4,7,12,7,12,1,4,1,5,9,20,31,30,9,20,1,5,1,
%T 6,11,30,49,60,49,60,11,30,1,6,1,7,13,42,71,105,209,140,71,105,13,42,
%U 1,7,1,8,15,56,97,168,351,280,351,280,97,168
%N First numerator and then denominator (left to right) of Leibniz's harmonic-like triangle.
%C In this triangle the right-hand edge consists of the reciprocals of the positive integers. A number that is not in this edge is obtained by adding the number diagonally above it to the number to its immediate right. Note that in Leibniz's harmonic triangle we subtract the two numbers to get a number which is not on the right-hand edge.
%e 1/1;
%e 1/2, 1/2;
%e 1/3, 5/6, 1/3;
%e 1/4, 7/12, 7/12, 1/4;
%e 1/5, 9/20, 31/30, 9/20, 1/5;
%Y Cf. A003506; A007622; A046201; A046204; A046205; A046206; A046208; A046212.
%Y Cf. A137753
%K frac,nonn,tabf,less
%O 1,4
%A _Mohammad K. Azarian_, Feb 10 2008
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