The Leibniz harmonic triangle is the number triangle given by 1/1 1/2 1/2 1/3 1/6 1/3 1/4 1/12 1/12 1/4 1/5 1/20 1/30 1/20 1/5 (OEIS A003506), where each fraction is the sum of numbers below it and the initial and final entries in the nth row are given by 1/n.
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