A137766 - OEIS

A137766

Elements to the right of the central element in writing first the numerator and then the denominator (left to right) of Leibniz's harmonic-like triangle.

1, 2, 1, 3, 7, 12, 1, 4, 9, 20, 1, 5, 49, 60, 11, 30, 1, 6, 71, 105, 13, 42, 1, 7, 351, 280, 97, 168, 15, 56, 1, 8, 545, 504, 127, 252, 17, 72, 1, 9, 2561, 1260, 799, 840, 161, 360, 19, 90, 1, 10, 4159, 2310, 1121, 1320, 199, 495, 21, 110, 1, 11

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..60.

EXAMPLE

1/1; -->

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

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

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

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

CROSSREFS