A137764 Elements to the right of the central elements in writing first the denominator and then the numerator(left to right) of Leibniz's harmonic-like triangle.

2, 1, 3, 1, 12, 7, 4, 1, 20, 9, 5, 1, 60, 49, 30, 11, 6, 1, 105, 71, 42, 13, 7, 1, 280, 351, 168, 97, 56, 15, 8, 1, 504, 545, 252, 127, 72, 17, 9, 1, 1260, 2561, 840, 799, 360, 161, 90, 19, 10, 1, 2310, 4159, 1320, 1121, 495, 199, 110, 21, 11, 1

Offset

1,1

Links

Table of n, a(n) for n=1..60.

Example

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

Crossrefs

Cf. A046201; A046204; A046205; A046206; A046208; A046212; A137752; A137753; A137754; A137755; A137756; A137757; A137758; A137759, A137760; A137761; A137762; A137763.

Sequence in context: A046208 A195909 A195697 * A344752 A057082 A218951

Adjacent sequences: A137761 A137762 A137763 * A137765 A137766 A137767

Keyword

nonn,tabf,frac,less

Author

Mohammad K. Azarian, Feb 13 2008

Status

approved