A137756 - OEIS

A137756

Nontrivial elements in writing the numerator of an element first and then the denominator of that element (left to right) of Leibniz's harmonic-like triangle. That is, the nontrivial elements of A137752.

2, 2, 3, 5, 6, 3, 4, 7, 12, 7, 12, 4, 5, 9, 20, 31, 30, 9, 20, 5, 6, 11, 30, 49, 60, 49, 60, 11, 30, 6, 7, 13, 42, 71, 105, 209, 140, 71, 105, 13, 42, 7, 8, 15, 56, 97, 168, 351, 280, 351, 280, 97, 168, 15, 56, 8, 9, 17, 72, 127, 252, 545, 504, 1471

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..64.

EXAMPLE

1/1; -->

1/2, 1/2; --> 2 2

1/3, 5/6, 1/3; --> 3 5 6 3

1/4, 7/12, 7/12, 1/4; --> ...

1/5, 9/20, 31/30, 9/20, 1/5;

CROSSREFS