A046533 First denominator and then numerator of 1/2-Pascal triangle (by row), excluding 2's.

1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 1, 1, 1, 1, 5, 1, 3, 5, 1, 1, 1, 1, 7, 11, 11, 7, 1, 1, 1, 1, 9, 1, 9, 1, 11, 1, 9, 9, 1, 1, 1, 1, 11, 27, 1, 20, 1, 20, 27, 11, 1, 1, 1, 1, 13, 1, 19, 67, 1, 40, 67, 1, 19, 13, 1, 1, 1, 1, 15, 51

Offset

1,14

Links

Table of n, a(n) for n=1..75.

Example

1/1;
1/1 1/1;
1/1 1/2 1/1;
1/1 3/2 3/2 1/1;
1/1 5/2 3/1 5/2 1/1;
1/1 7/2 11/2 11/2 7/2 1/1;
1/1 9/2 9/1 11/1 9/1 9/2 1/1;
1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1; ...
with numerator/denominator exchange and without the 2's.

Crossrefs

Cf. A046213.

Sequence in context: A351577 A328572 A016554 * A046532 A014421 A127197

Adjacent sequences: A046530 A046531 A046532 * A046534 A046535 A046536

Keyword

tabf,nonn,less

Author

Mohammad K. Azarian

Status

approved