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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.

A320746 Number of chiral pairs of color patterns (set partitions) in a cycle of length n using 6 or fewer colors (subsets).

Table of values

n a(n)
1 0
2 0
3 0
4 0
5 0
6 6
7 34
8 190
9 996
10 5070
11 26454
12 139484
13 749742
14 4082481
15 22509626
16 125231540
17 702004040
18 3958071545
19 22423227634
20 127524417922
21 727617119592
22 4163076477731
23 23876455868772
24 137228326265794
25 790200053665362
26 4557942281943078
27 26331297198477874
28 152331940294133402
29 882422871962784662
30 5117852332008063806
31 29715786649820358328
32 172720006045619486686
33 1004904748993330281274
34 5852047136464153694312

List of values

[0, 0, 0, 0, 0, 6, 34, 190, 996, 5070, 26454, 139484, 749742, 4082481, 22509626, 125231540, 702004040, 3958071545, 22423227634, 127524417922, 727617119592, 4163076477731, 23876455868772, 137228326265794, 790200053665362, 4557942281943078, 26331297198477874, 152331940294133402, 882422871962784662, 5117852332008063806, 29715786649820358328, 172720006045619486686, 1004904748993330281274, 5852047136464153694312]

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

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