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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.

A328743 Number of n-bead necklace structures which are not self-equivalent under a nonzero rotation using a maximum of four different colored beads.

Table of values

n a(n)
0 1
1 1
2 0
3 1
4 2
5 10
6 26
7 102
8 336
9 1225
10 4352
11 15934
12 58190
13 215250
14 798720
15 2983136
16 11184128
17 42109450
18 159070352
19 602809326
20 2290640486
21 8726307432
22 33318502400
23 127479700198
24 488671717040
25 1876500180280
26 7217306664960
27 27799998938929
28 107228560958610
29 414124108294450

List of values

[1, 1, 0, 1, 2, 10, 26, 102, 336, 1225, 4352, 15934, 58190, 215250, 798720, 2983136, 11184128, 42109450, 159070352, 602809326, 2290640486, 8726307432, 33318502400, 127479700198, 488671717040, 1876500180280, 7217306664960, 27799998938929, 107228560958610, 414124108294450]

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

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