( 1024 birthdays, 16777216 days in year)
Table of Expected vs. Observed counts:
<=6 20.0 9
7 30.0 24
8 59.9 68
9 106.6 107
10 170.5 171
11 248.0 267
12 330.6 387
13 406.9 397
14 465.1 467
15 496.1 515
16 496.1 529
17 466.9 453
18 415.0 423
19 349.5 316
20 279.6 291
21 213.0 193
22 154.9 129
23 107.8 105
24 71.9 61
25 46.0 35
26 28.3 23
>=27 37.3 30
Overall p is 0.9921