A046556 Odd numbers found when writing first denominator and then numerator of each element of the 1/3-Pascal triangle (by row).

1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 3, 3, 1, 1, 1, 1, 3, 7, 3, 3, 7, 1, 1, 1, 1, 3, 1, 5, 1, 5, 3, 1, 1, 1, 1, 3, 13, 3, 25, 1, 3, 25, 3, 13, 1, 1, 1, 1, 3, 3, 3, 55, 3, 55, 3, 3, 1, 1, 1, 1, 3, 19, 1, 3, 93, 3, 3, 93, 1, 3, 19, 1, 1, 1, 1, 3, 3, 73