A137754 - OEIS

A137754

Numerators (left to right) of Leibniz's harmonic-like triangle.

1, 1, 1, 1, 5, 1, 1, 7, 7, 1, 1, 9, 31, 9, 1, 1, 11, 49, 49, 11, 1, 1, 13, 71, 209, 71, 13, 1, 1, 15, 97, 351, 351, 97, 15, 1, 1, 17, 127, 545, 1471, 545, 127, 17, 1, 1, 19, 161, 799, 2561, 2561, 799, 161, 19, 1, 1, 21, 199, 1121, 4159, 10625, 4159, 1121, 199, 21, 1

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OFFSET

1,5

LINKS

Table of n, a(n) for n=1..66.

EXAMPLE

1/1; --> 1

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

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

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

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

CROSSREFS