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.

A189831 Labeled simple graphs with n nodes and n-1 edges that are not trees.

Table of values

n a(n)
1 0
2 0
3 0
4 4
5 85
6 1707
7 37457
8 921896
9 25477371
10 786163135
11 26890701739
12 1012165431744
13 41638805754078
14 1860589088529164
15 89802422444553825
16 4658465562594667088
17 258566755450911870007
18 15294477441385413149679
19 960641026388207044487891
20 63861339527473864490450300

List of values

[0, 0, 0, 4, 85, 1707, 37457, 921896, 25477371, 786163135, 26890701739, 1012165431744, 41638805754078, 1860589088529164, 89802422444553825, 4658465562594667088, 258566755450911870007, 15294477441385413149679, 960641026388207044487891, 63861339527473864490450300]

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

Content is available under The OEIS End-User License Agreement.