A137769 Nontrivial odd numbers in writing first the denominator and then the numerator (left to right) of Leibniz's harmonic-like triangle.
3, 5, 3, 7, 7, 5, 9, 31, 9, 5, 11, 49, 49, 11, 7, 13, 105, 71, 209, 105, 71, 13, 7, 15, 97, 351, 351, 97, 15, 9, 17, 127, 545, 1471, 545, 127, 17, 9, 19, 161, 799, 2561, 2561, 799, 161, 19, 11, 21, 495, 199, 1121, 4159, 10625, 4159, 1121, 495, 199, 21, 11
Offset: 1
Examples
1/1; --> 1/2, 1/2; --> 1/3, 5/6, 1/3; --> 3 5 1/4, 7/12, 7/12, 1/4; --> 7 7 1/5, 9/20, 31/30, 9/20, 1/5;