( 1024 birthdays, 16777216 days in year)
Table of Expected vs. Observed counts:
<=6 20.0 16
7 30.0 33
8 59.9 59
9 106.6 113
10 170.5 185
11 248.0 295
12 330.6 331
13 406.9 440
14 465.1 477
15 496.1 516
16 496.1 477
17 466.9 478
18 415.0 405
19 349.5 357
20 279.6 286
21 213.0 167
22 154.9 133
23 107.8 93
24 71.9 55
25 46.0 46
26 28.3 15
>=27 37.3 23
Overall p is 0.9993