A046546 First numerator and then denominator of the elements to the right of the central elements of the 1/3-Pascal triangle.

1, 1, 1, 1, 4, 3, 1, 1, 7, 3, 1, 1, 5, 1, 10, 3, 1, 1, 25, 3, 13, 3, 1, 1, 55, 3, 38, 3, 16, 3, 1, 1, 31, 1, 18, 1, 19, 3, 1, 1, 203, 3, 49, 1, 73, 3, 22, 3, 1, 1, 350, 3, 220, 3, 95, 3, 25, 3, 1, 1, 252, 1, 190, 1, 105, 1, 40, 1, 28, 3, 1, 1, 442, 1, 295, 1

Offset

1,5

Links

Table of n, a(n) for n=1..76.

Example

1/1; -->
1/1 1/1; --> 1 1
1/1 1/3 1/1; --> 1 1
1/1 4/3 4/3 1/1; --> 4 3 1 1
1/1 7/3 8/3 7/3 1/1; --> ...
1/1 10/3 5/1 5/1 10/3 1/1;
1/1 13/3 25/3 10/1 25/3 13/3 1/1;
1/1 16/3 38/3 55/3 55/3 38/3 16/3 1/1; ...

Crossrefs

Cf. A046534.

Sequence in context: A211451 A371809 A157464 * A189967 A139623 A278072

Adjacent sequences: A046543 A046544 A046545 * A046547 A046548 A046549

Keyword

tabf,nonn,frac,less

Author

Mohammad K. Azarian

Extensions

Data corrected and extended by Sean A. Irvine, Apr 13 2021

Status

approved