A046566 First denominator and then numerator of the 1/4-Pascal triangle (by row), excluding 1's.

4, 4, 5, 4, 5, 4, 9, 2, 5, 4, 9, 4, 13, 4, 19, 4, 19, 4, 13, 4, 17, 8, 2, 19, 8, 4, 17, 4, 21, 4, 49, 2, 35, 2, 35, 4, 49, 4, 21, 4, 25, 2, 35, 4, 119, 35, 4, 119, 2, 35, 4, 25, 4, 29, 4, 95, 4, 189, 4, 259, 4, 259, 4, 189, 4, 95, 4, 29, 4, 33, 31, 71, 112, 2

Offset

1,1

Links

Table of n, a(n) for n=1..74.

Example

1/1; -->
1/1  1/1; -->
1/1  1/4  1/1; --> 4
1/1  5/4  5/4  1/1; --> 4 5 4 5
1/1  9/4  5/2  9/4  1/1; --> 4 9 2 5 4 9
1/1 13/4 19/4 19/4 13/4  1/1; --> ...
1/1 17/4  8/1 19/2  8/1 17/4  1/1;
1/1 21/4 49/4 35/2 35/2 49/4 21/4 1/1; ...

Crossrefs

Cf. A046563.

Sequence in context: A023403 A091283 A161758 * A046593 A158935 A226446

Adjacent sequences: A046563 A046564 A046565 * A046567 A046568 A046569

Keyword

tabf,nonn,less

Author

Mohammad K. Azarian

Extensions

More terms from Sean A. Irvine, Apr 13 2021

Status

approved