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.

A002862 Number of nonisomorphic connected functions with no fixed points, or proper rings with n edges.

Table of values

n a(n)
1 0
2 1
3 2
4 5
5 11
6 31
7 77
8 214
9 576
10 1592
11 4375
12 12183
13 33864
14 94741
15 265461
16 746372
17 2102692
18 5938630
19 16803610
20 47639902
21 135288198
22 384812502
23 1096141974
24 3126648842
25 8929715592
26 25533447030
27 73090099586
28 209438176485
29 600721031344
30 1724585494225

List of values

[0, 1, 2, 5, 11, 31, 77, 214, 576, 1592, 4375, 12183, 33864, 94741, 265461, 746372, 2102692, 5938630, 16803610, 47639902, 135288198, 384812502, 1096141974, 3126648842, 8929715592, 25533447030, 73090099586, 209438176485, 600721031344, 1724585494225]