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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.

A322137 Number of labeled connected graphs with n edges (the vertices are {1,2,...,k} for some k).

Table of values

n a(n)
0 1
1 1
2 3
3 17
4 140
5 1524
6 20673
7 336259
8 6382302
9 138525780
10 3384988809
11 91976158434
12 2751122721402
13 89833276321440
14 3179852538140115
15 121287919647418118
16 4959343701136929850
17 216406753768138678671
18 10037782414506891597734
19 493175891246093032826160

List of values

[1, 1, 3, 17, 140, 1524, 20673, 336259, 6382302, 138525780, 3384988809, 91976158434, 2751122721402, 89833276321440, 3179852538140115, 121287919647418118, 4959343701136929850, 216406753768138678671, 10037782414506891597734, 493175891246093032826160]

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

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