Harmonic Sequence and Pascal’s Triangle

We show in this note how, starting with the infinite harmonic sequence 1, 1/2, 1/3, 1/4, 1/5, 1/6, . . . , a natural process yields the well-known Pascal triangle and, further, a curious procedure yields back the harmonic sequence.
(‘Harmonic sequence’ is another name for the sequence of reciprocals of the positive integers.)
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