A137765 Nontrivial numbers of the 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. That is, the nontrivial elements of A137764.

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

Offset

1,1

Links

Table of n, a(n) for n=1..50.

Example

1/1; -->
1/2, 1/2;  --> 2
1/3, 5/6, 1/3; --> 3
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; A137764.

Sequence in context: A361323 A292265 A259416 * A356946 A287509 A282417

Adjacent sequences: A137762 A137763 A137764 * A137766 A137767 A137768

Keyword

nonn,tabf,frac,less

Author

Mohammad K. Azarian, Feb 13 2008

Status

approved