I am a dummy level, and my answer is the same as other two.

This is what I listed:
1 10 3 12 5 14 7 16 9 -> pick up missing
2 11 4 13 6 15 8 17 -> a little bigger jump
26 19 28 21 30 23 32 -> pick up missing again
25 18 27 20 29 22 31 24 -> 24, 25, 26 are kissing together

so it is safe to start another cycle:
33 42 35 44 37 46 48 41 -> pickup missing
34 43 .... 56

A third cycle:
65 ... 88

The last
97.

So if the question is changed into from 1 -98, I cannot see the answer.