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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. 4
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 (list; graph; refs; listen; history; text; internal format)
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: A088611 A292265 A259416 * A287509 A282417 A287607

Adjacent sequences:  A137762 A137763 A137764 * A137766 A137767 A137768

KEYWORD

nonn,tabf,frac,less

AUTHOR

Mohammad K. Azarian, Feb 13 2008

STATUS

approved

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Last modified May 16 05:18 EDT 2022. Contains 353693 sequences. (Running on oeis4.)