A046228 First numerator and then denominator of elements to right of central elements of 1/2-Pascal triangle (by row), excluding 1's and 2's.

3, 5, 11, 7, 9, 9, 20, 27, 11, 67, 19, 13, 147, 105, 51, 15, 126, 78, 33, 17, 273, 204, 111, 83, 19, 477, 315, 305, 51, 21, 1023, 792, 935, 407, 123, 23, 1815, 2519, 671, 265, 73, 25, 3861, 6149, 3861, 936, 338, 171, 27, 13871, 5005, 5733, 1274, 847, 99, 29, 29315

Offset

1,1

Links

Table of n, a(n) for n=1..57.

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; ...

Crossrefs

Cf. A046213.

Sequence in context: A214862 A151885 A137656 * A132162 A168323 A154561

Adjacent sequences: A046225 A046226 A046227 * A046229 A046230 A046231

Keyword

tabf,nonn

Author

Mohammad K. Azarian

Extensions

More terms from James A. Sellers, Dec 13 1999

Status

approved