1st one . . . . . 1
2nd one . . . . . 3
3rd one . . . . . 5
4th one . . . . . 7
5th one . . . . . 9
.
.
9th one . . . . . 17
It looks to me like the 'n'th odd number is always (2n - 1) .
In that case, the 200th odd number is (2x200 - 1) = 399 .
I'll let you check it out and see if that's correct.