Chances of Bobette spawning in a run

Chances of encountering bobette once, in a solo run (Chances may be inaccurate, but I tried my best to make it as accurate as possible)

Floor 1: 0% Floor 2: 0% Floor 3: 0% Floor 4: 0% Floor 5: 4.1784% Floor 6: 5.3784% Floor 7: 6.5784% Floor 8: 7.7784% Floor 9: 8.9784% Floor 10: 16.94905% Floor 11: 19.24905% Floor 12: 21.54905% Floor 13: 24.99905% Floor 14: 28.44905% Floor 15: 41.44905% Floor 16: 46.44905% Floor 17: 53.11571666...% Floor 18: 59.78238333...% Floor 19: 66.44904999...% Floor 20: 100%

What's the chances of encountering bobette again, after Floor 20?

Floor 21: 10.75% Floor 22: 21.5% Floor 23: 32.25% Floor 24: 43% Floor 25: 73.45325% Floor 26: 91.55325% Floor 27: 100% (109.65325%)

What about a third time?

Floor 28: 18.1% Floor 29: 36.2% Floor 30: 66.65425% Floor 31: 84.75325% Floor 32: 100% (102.85325%)

How about a forth?

Floor 33: 18.1% Floor 34: 36.2% Floor 35: 66.65325% Floor 36: 84.75325% Floor 37: 100% (102.85325%)

Now for the fifth time

Floor 38: 18.1% Floor 39: 36.2% Floor 40: 100%

Chance Increase for Bobette Floor 5 - 9: +1.2% Floor 11 - 12: +2.3% Floor 12 - 14: +3.45% Floor 16: +5% Floor 17 - 19: +6.66...% Floor 21 - 24: +10.75% Floor 26+: +18.1% (Did not count the chances for every 5 floors as the chance of encountering her is higher but reduces back after every 5th floor)

Also, Bobette has a 100% spawn chance every 20 floors

I spent an hour doing this