A046226 First denominator and then numerator of elements to right of central elements of 1/2-Pascal triangle.

1, 1, 1, 1, 2, 3, 1, 1, 2, 5, 1, 1, 2, 11, 2, 7, 1, 1, 1, 9, 2, 9, 1, 1, 1, 20, 2, 27, 2, 11, 1, 1, 2, 67, 1, 19, 2, 13, 1, 1, 2, 147, 2, 105, 2, 51, 2, 15, 1, 1, 1, 126, 1, 78, 1, 33, 2, 17, 1, 1