A046555 Odd numbers in writing first numerator and then denominator of each element of the 1/3-Pascal triangle (by row).

1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 3, 3, 1, 1, 1, 1, 7, 3, 3, 7, 3, 1, 1, 1, 1, 3, 5, 1, 5, 1, 3, 1, 1, 1, 1, 13, 3, 25, 3, 1, 25, 3, 13, 3, 1, 1, 1, 1, 3, 3, 55, 3, 55, 3, 3, 3, 1, 1, 1, 1, 19, 3, 1, 31, 1, 3, 31, 1, 1, 19, 3, 1, 1, 1, 1, 3, 73, 3, 49, 1, 203, 3, 203, 3, 49, 1, 73, 3, 3, 1, 1

Offset

1,10

Links

Table of n, a(n) for n=1..95.

Example

1/1; --> 1 1
1/1  1/1; --> 1 1 1 1
1/1  1/3  1/1; --> 1 1 1 3 1 1
1/1  4/3  4/3  1/1; --> 1 1 3 3 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: A214249 A271714 A049639 * A336467 A331112 A029382

Adjacent sequences: A046552 A046553 A046554 * A046556 A046557 A046558

Keyword

tabf,nonn,easy,less

Author

Mohammad K. Azarian

Extensions

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

Further corrected by Sean A. Irvine, Apr 13 2021

Status

approved