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.

A111275 Number of inequivalent non-crossing partitions of n (equally spaced) points on a circle, under rotations and reflections.

Table of values

n a(n)
1 1
2 2
3 3
4 6
5 10
6 24
7 49
8 130
9 336
10 980
11 2904
12 9176
13 29432
14 97356
15 326399
16 1111770
17 3825238
18 13293456
19 46553116
20 164200028
21 582706692
22 2079517924
23 7458493728
24 26874412064
25 97241528200
26 353223728624
27 1287668381250
28 4709805627484

List of values

[1, 2, 3, 6, 10, 24, 49, 130, 336, 980, 2904, 9176, 29432, 97356, 326399, 1111770, 3825238, 13293456, 46553116, 164200028, 582706692, 2079517924, 7458493728, 26874412064, 97241528200, 353223728624, 1287668381250, 4709805627484]

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

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