A046552 First numerator and then denominator of each element of the 1/3-Pascal triangle (by row), excluding 3's.

1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 4, 1, 1, 1, 1, 7, 8, 7, 1, 1, 1, 1, 10, 5, 1, 5, 1, 10, 1, 1, 1, 1, 13, 25, 10, 1, 25, 13, 1, 1, 1, 1, 16, 38, 55, 55, 38, 16, 1, 1, 1, 1, 19, 18, 1, 31, 1, 110, 31, 1, 18, 1, 19, 1, 1, 1, 1, 22, 73, 49, 1, 203, 203

Offset

1,14

Links

Table of n, a(n) for n=1..77.

Example

1/1; --> 1 1
1/1  1/1; --> 1 1 1 1
1/1  1/3  1/1; -->  1 1 1 1 1
1/1  4/3  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: A057278 A010303 A046553 * A155454 A143484 A047214

Adjacent sequences: A046549 A046550 A046551 * A046553 A046554 A046555

Keyword

tabf,nonn,less

Author

Mohammad K. Azarian

Extensions

Data corrected by Sean A. Irvine, Apr 13 2021

Status

approved