A046538 First denominator and then numerator of the 1/3-Pascal triangle (by row), excluding 1's and 3's.

4, 4, 7, 8, 7, 10, 5, 5, 10, 13, 25, 10, 25, 13, 16, 38, 55, 55, 38, 16, 19, 18, 31, 110, 31, 18, 19, 22, 73, 49, 203, 203, 49, 73, 22, 25, 95, 220, 350, 406, 350, 220, 95, 25, 28, 40, 105, 190, 252, 252, 190, 105, 40, 28, 31, 148, 145, 295, 442, 504, 442, 295

Offset

1,1

Links

Table of n, a(n) for n=1..62.

Example

1/1; -->
1/1  1/1; -->
1/1  1/3  1/1; -->
1/1  4/3  4/3  1/1; --> 4 4
1/1  7/3  8/3  7/3  1/1; --> 7 8 7
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: A238391 A049647 A263619 * A353713 A107432 A198991

Adjacent sequences: A046535 A046536 A046537 * A046539 A046540 A046541

Keyword

tabf,nonn,less

Author

Mohammad K. Azarian

Extensions

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

Status

approved