A137758 Odd elements in writing the denominator of an element first and then the numerator of that element (left to right) of Leibniz's harmonic-like triangle. That is, the odd elements of A137753.
1, 1, 1, 1, 3, 1, 5, 3, 1, 1, 7, 7, 1, 5, 1, 9, 31, 9, 5, 1, 1, 11, 49, 49, 11, 1, 7, 1, 13, 105, 71, 209, 105, 71, 13, 7, 1, 1, 15, 97, 351, 351, 97, 15, 1, 9, 1, 17, 127, 545, 1471, 545, 127, 17, 9, 1, 1, 19, 161, 799, 2561, 2561, 799, 161, 19, 1
Offset: 1
Examples
1/1; --> 1 1 1/2, 1/2; --> 1 1 1/3, 5/6, 1/3; --> 3 1 5 3 1 1/4, 7/12, 7/12, 1/4; --> ... 1/5, 9/20, 31/30, 9/20, 1/5;