A046537 First denominator and then numerator of the 1/3-Pascal triangle (by row), excluding 1's.

3, 3, 4, 3, 4, 3, 7, 3, 8, 3, 7, 3, 10, 5, 5, 3, 10, 3, 13, 3, 25, 10, 3, 25, 3, 13, 3, 16, 3, 38, 3, 55, 3, 55, 3, 38, 3, 16, 3, 19, 18, 31, 3, 110, 31, 18, 3, 19, 3, 22, 3, 73, 49, 3, 203, 3, 203, 49, 3, 73, 3, 22, 3, 25, 3, 95, 3, 220, 3, 350, 3, 406, 3, 350, 3, 220, 3, 95, 3, 25

Offset

1,1

Links

Table of n, a(n) for n=1..80.

Example

1/1; -->
1/1 1/1; -->
1/1 1/3 1/1; --> 3
1/1 4/3 4/3 1/1; --> 3 4 3 4
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: A276864 A342928 A236442 * A167596 A216190 A267592

Adjacent sequences: A046534 A046535 A046536 * A046538 A046539 A046540

Keyword

tabf,nonn,easy,frac,less

Author

Mohammad K. Azarian

Extensions

Corrected and extended by Larry Reeves (larryr(AT)acm.org), Apr 06 2000

Status

approved