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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.

A304070 Number of simple graphs with n vertices rooted at a pair of distinguished vertices.

Table of values

n a(n)
1 0
2 2
3 8
4 40
5 240
6 1992
7 24416
8 483040
9 16343872
10 982635280
11 106979975168
12 21285548190080
13 7783083940331520
14 5254164116114948480
15 6577258363669088914432
16 15332656940815954900371968
17 66830735142688170751257497600
18 546722015615195079134707942219904

List of values

[0, 2, 8, 40, 240, 1992, 24416, 483040, 16343872, 982635280, 106979975168, 21285548190080, 7783083940331520, 5254164116114948480, 6577258363669088914432, 15332656940815954900371968, 66830735142688170751257497600, 546722015615195079134707942219904]

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

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