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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A091673 Numerator Q of probability P = Q(n)/365^(n-1) that exactly two out of n people share the same birthday.

Table of values

n a(n)
2 1
3 1092
4 793884
5 480299820
6 261163522620
7 132358677731280
8 63798093049771080
9 29612552769907347240
10 13345042642324219106280
11 5872442544965392834838400
12 2533775368098060137659608000
13 1075256447734638237381213700800

List of values

[1, 1092, 793884, 480299820, 261163522620, 132358677731280, 63798093049771080, 29612552769907347240, 13345042642324219106280, 5872442544965392834838400, 2533775368098060137659608000, 1075256447734638237381213700800]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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