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

1,1

Links

Table of n, a(n) for n=1..59.

Example

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;

Crossrefs

Cf. A137752.

Cf. A046212, A137752, A137753, A137754, A137755, A137756, A137757, A137758, A137759, A137760, A137761, A137762, A137763, A137764, A137765, A137766, A137767: A137768.

Sequence in context: A154800 A263175 A137768 * A029602 A210041 A345280

Adjacent sequences: A137766 A137767 A137768 * A137770 A137771 A137772

Keyword

nonn,tabf,frac,less

Author

Mohammad K. Azarian, Feb 13 2008

Status

approved