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.

A290816 Number of dissections of an n-gon into polygons with odd number of sides counted up to rotations and reflections.

Table of values

n a(n)
3 1
4 1
5 2
6 4
7 8
8 23
9 65
10 223
11 757
12 2824
13 10559
14 40994
15 160734
16 641420
17 2584587
18 10528305
19 43237978
20 178974779
21 745814185
22 3127246179
23 13185588894
24 55878618492
25 237905685582
26 1017225981255
27 4366536472758
28 18812074137141
29 81320795918871
30 352638701880227

List of values

[1, 1, 2, 4, 8, 23, 65, 223, 757, 2824, 10559, 40994, 160734, 641420, 2584587, 10528305, 43237978, 178974779, 745814185, 3127246179, 13185588894, 55878618492, 237905685582, 1017225981255, 4366536472758, 18812074137141, 81320795918871, 352638701880227]

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

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