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.

A290722 Number of dissections of a 2n-gon into polygons with even number of sides counted up to rotations and reflections.

Table of values

n a(n)
2 1
3 2
4 4
5 13
6 48
7 238
8 1325
9 8297
10 54519
11 373363
12 2621872
13 18797682
14 136969519
15 1011903735
16 7564219361
17 57129086391
18 435394899361
19 3345082819597
20 25885718422329
21 201619294539406
22 1579629974876090
23 12442262963919863
24 98483477967355109
25 783017782731507416

List of values

[1, 2, 4, 13, 48, 238, 1325, 8297, 54519, 373363, 2621872, 18797682, 136969519, 1011903735, 7564219361, 57129086391, 435394899361, 3345082819597, 25885718422329, 201619294539406, 1579629974876090, 12442262963919863, 98483477967355109, 783017782731507416]

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

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