A137754 Numerators (left to right) of Leibniz's harmonic-like triangle.

1, 1, 1, 1, 5, 1, 1, 7, 7, 1, 1, 9, 31, 9, 1, 1, 11, 49, 49, 11, 1, 1, 13, 71, 209, 71, 13, 1, 1, 15, 97, 351, 351, 97, 15, 1, 1, 17, 127, 545, 1471, 545, 127, 17, 1, 1, 19, 161, 799, 2561, 2561, 799, 161, 19, 1, 1, 21, 199, 1121, 4159, 10625, 4159, 1121, 199, 21, 1

Offset

1,5

Links

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

Example

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

Crossrefs

Cf. A137752.

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

Sequence in context: A029646 A152721 A132737 * A131404 A297943 A298554

Adjacent sequences: A137751 A137752 A137753 * A137755 A137756 A137757

Keyword

frac,nonn,tabl

Author

Mohammad K. Azarian, Feb 10 2008

Status

approved