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%I #7 Jun 22 2013 16:06:10
%S 1,2,3,5,6,4,7,12,9,20,31,30,11,49,60,13,42,71,105,209,140,8,15,56,97,
%T 168,351,280,17,72,127,252,545,504,1471,630,10,19,90,161,360,799,840,
%U 2561,1260,21,110,199,495,1121,1320,4159,2310,10625,2772
%N Distinct numbers in writing first numerator and then denominator (left to right) of Leibniz's harmonic-like triangle.
%e 1/1; --> 1
%e 1/2, 1/2; --> 2
%e 1/3, 5/6, 1/3; --> 3 5 6
%e 1/4, 7/12, 7/12, 1/4; --> ...
%e 1/5, 9/20, 31/30, 9/20, 1/5;
%Y Cf. A046201; A046204; A046205; A046206; A046208; A046212; A137752; A137753; A137754; A137755; A137756; A137757; A137758; A137759.
%K frac,nonn,tabf,less
%O 1,2
%A _Mohammad K. Azarian_, Feb 11 2008