A137755 Nontrivial numerators (left to right) of Leibniz's harmonic-like triangle.

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

Offset

1,1

Links

Table of n, a(n) for n=1..45.

Example

1/1; -->
1/2, 1/2;  -->
1/3, 5/6, 1/3; --> 5
1/4, 7/12, 7/12, 1/4; --> 7 7
1/5, 9/20, 31/30, 9/20, 1/5; --> 9 31 9

Crossrefs

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

Sequence in context: A086056 A154475 A264527 * A258316 A244621 A201459

Adjacent sequences: A137752 A137753 A137754 * A137756 A137757 A137758

Keyword

frac,nonn,tabl

Author

Mohammad K. Azarian, Feb 10 2008

Status

approved