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

1,5

Links

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

Example

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;

Crossrefs

Cf. A003506; A007622; A046201; A046204; A046205; A046206; A046208; A046212; A137752; A137753; A137754; A137755; A137756; A137757.

Sequence in context: A351556 A134743 A099547 * A340530 A147754 A360325

Adjacent sequences: A137755 A137756 A137757 * A137759 A137760 A137761

Keyword

frac,nonn,tabf,less

Author

Mohammad K. Azarian, Feb 10 2008

Status

approved