A137760 Distinct numbers in writing first numerator and then denominator (left to right) of Leibniz's harmonic-like triangle.

1, 2, 3, 5, 6, 4, 7, 12, 9, 20, 31, 30, 11, 49, 60, 13, 42, 71, 105, 209, 140, 8, 15, 56, 97, 168, 351, 280, 17, 72, 127, 252, 545, 504, 1471, 630, 10, 19, 90, 161, 360, 799, 840, 2561, 1260, 21, 110, 199, 495, 1121, 1320, 4159, 2310, 10625, 2772

Offset

1,2

Links

Table of n, a(n) for n=1..55.

Example

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

Sequence in context: A209260 A297409 A335858 * A368428 A360600 A194863

Adjacent sequences: A137757 A137758 A137759 * A137761 A137762 A137763

Keyword

frac,nonn,tabf,less

Author

Mohammad K. Azarian, Feb 11 2008

Status

approved