A046579 First numerator and then denominator of the elements to the right of the central elements of the 1/4-Pascal triangle (by row), excluding 4's.

1, 1, 1, 1, 5, 1, 1, 9, 1, 1, 19, 13, 1, 1, 8, 1, 17, 1, 1, 35, 2, 49, 21, 1, 1, 119, 35, 2, 25, 1, 1, 259, 189, 95, 29, 1, 1, 112, 1, 71, 1, 31, 1, 33, 1, 1, 483, 2, 183, 1, 102, 1, 157, 37, 1, 1, 849, 2, 285, 1, 565, 97, 2, 41, 1, 1, 1815, 2, 1419, 2, 1705, 759, 235, 45, 1, 1, 1617

Offset

1,5

Links

Table of n, a(n) for n=1..77.

Example

1/1; 1/1 1/1; 1/1 1/4 1/1; 1/1 5/4 5/4 1/1; 1/1 9/4 5/2 9/4 1/1; 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: A141398 A058281 A046583 * A153108 A157174 A183450

Adjacent sequences: A046576 A046577 A046578 * A046580 A046581 A046582

Keyword

nonn

Author

Mohammad K. Azarian

Extensions

More terms from James A. Sellers, Dec 14 1999

Status

approved