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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.

A092239 Number of orbits of length n under the map whose periodic points are counted by A061693.

Table of values

n a(n)
1 0
2 2
3 9
4 42
5 225
6 1260
7 7497
8 46176
9 293382
10 1908150
11 12655269
12 85287870
13 582628683
14 4026368514
15 28104231825
16 197884340160
17 1404038987577
18 10029929788566
19 72086075552493
20 520920674929650

List of values

[0, 2, 9, 42, 225, 1260, 7497, 46176, 293382, 1908150, 12655269, 85287870, 582628683, 4026368514, 28104231825, 197884340160, 1404038987577, 10029929788566, 72086075552493, 520920674929650]

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

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