A046227 First numerator and then denominator of elements to right of central elements of 1/2-Pascal triangle (by row), excluding 1's.

3, 2, 5, 2, 11, 2, 7, 2, 9, 9, 2, 20, 27, 2, 11, 2, 67, 2, 19, 13, 2, 147, 2, 105, 2, 51, 2, 15, 2, 126, 78, 33, 17, 2, 273, 204, 111, 83, 2, 19, 2, 477, 315, 305, 2, 51, 21, 2, 1023, 792, 935, 2, 407, 2, 123, 2, 23, 2, 1815, 2519, 2, 671, 265, 73, 25, 2, 3861

Offset

1,1

Links

Table of n, a(n) for n=1..67.

Example

1/1; -->
1/1  1/1; -->
1/1  1/2  1/1; -->
1/1  3/2  3/2  1/1; --> 3 2
1/1  5/2  3/1  5/2  1/1; --> 5 2
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: A103833 A226172 A281006 * A120842 A319044 A230820

Adjacent sequences: A046224 A046225 A046226 * A046228 A046229 A046230

Keyword

tabf,nonn,frac,less

Author

Mohammad K. Azarian

Extensions

More terms from Sean A. Irvine, Apr 07 2021

Status

approved