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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.

A377569 Number of simple graphs such that each connected component is nonseparable and the number of vertices minus the number of connected components equals n.

Table of values

n a(n)
0 1
1 1
2 2
3 5
4 16
5 75
6 560
7 7772
8 202546
9 9955274
10 911146844
11 154541913254
12 48588413940171
13 28410569347709449
14 31024350279787141361
15 63532688288261802284578
16 244915643061880269492533777
17 1783405573307429828266152750816
18 24605670701967180148649252153837623

List of values

[1, 1, 2, 5, 16, 75, 560, 7772, 202546, 9955274, 911146844, 154541913254, 48588413940171, 28410569347709449, 31024350279787141361, 63532688288261802284578, 244915643061880269492533777, 1783405573307429828266152750816, 24605670701967180148649252153837623]

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

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