For  2 people, the probability of 2 birthdays is 0.00380
For  3 people, the probability of 2 birthdays is 0.00960
For  4 people, the probability of 2 birthdays is 0.01700
For  5 people, the probability of 2 birthdays is 0.02360
For  6 people, the probability of 2 birthdays is 0.03920
For  7 people, the probability of 2 birthdays is 0.05500
For  8 people, the probability of 2 birthdays is 0.07720
For  9 people, the probability of 2 birthdays is 0.09000
For 10 people, the probability of 2 birthdays is 0.11320
For 11 people, the probability of 2 birthdays is 0.13800
For 12 people, the probability of 2 birthdays is 0.16700
For 13 people, the probability of 2 birthdays is 0.19140
For 14 people, the probability of 2 birthdays is 0.22060
For 15 people, the probability of 2 birthdays is 0.25480
For 16 people, the probability of 2 birthdays is 0.28940
For 17 people, the probability of 2 birthdays is 0.31820
For 18 people, the probability of 2 birthdays is 0.33600
For 19 people, the probability of 2 birthdays is 0.38000
For 20 people, the probability of 2 birthdays is 0.41100
For 21 people, the probability of 2 birthdays is 0.44700
For 22 people, the probability of 2 birthdays is 0.46860
For 23 people, the probability of 2 birthdays is 0.51680
For 24 people, the probability of 2 birthdays is 0.54800
For 25 people, the probability of 2 birthdays is 0.58180
For 26 people, the probability of 2 birthdays is 0.59040
For 27 people, the probability of 2 birthdays is 0.62800
For 28 people, the probability of 2 birthdays is 0.65440
For 29 people, the probability of 2 birthdays is 0.67680
For 30 people, the probability of 2 birthdays is 0.70600
For 31 people, the probability of 2 birthdays is 0.72580
For 32 people, the probability of 2 birthdays is 0.75700
For 33 people, the probability of 2 birthdays is 0.78680
For 34 people, the probability of 2 birthdays is 0.80740
For 35 people, the probability of 2 birthdays is 0.82200
For 36 people, the probability of 2 birthdays is 0.84460
For 37 people, the probability of 2 birthdays is 0.85200
For 38 people, the probability of 2 birthdays is 0.86940
For 39 people, the probability of 2 birthdays is 0.88280
For 40 people, the probability of 2 birthdays is 0.88460
For 41 people, the probability of 2 birthdays is 0.89980
For 42 people, the probability of 2 birthdays is 0.91440