cp's OEIS Frontend

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.

A007108 Number of connected labeled 2-regular digraphs with n nodes.

Table of values

n a(n)
0 0
1 0
2 0
3 1
4 9
5 216
6 7560
7 357120
8 22025430
9 1720751760
10 166198926600
11 19453788144000
12 2714247736061400
13 445133524289731200
14 84788348720139464400
15 18565341317290193025600
16 4631048864538293219022000
17 1305644758257711732981120000
18 413133912085072442199311376000

List of values

[0, 0, 0, 1, 9, 216, 7560, 357120, 22025430, 1720751760, 166198926600, 19453788144000, 2714247736061400, 445133524289731200, 84788348720139464400, 18565341317290193025600, 4631048864538293219022000, 1305644758257711732981120000, 413133912085072442199311376000]

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

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