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.

A209030 Number of n-bead necklaces labeled with numbers -6..6 allowing reversal, with sum zero and first differences in -6..6.

Table of values

n a(n)
1 1
2 4
3 10
4 60
5 358
6 2798
7 22249
8 186765
9 1596162
10 13907330
11 122758794
12 1096122478
13 9880366438
14 89796245827
15 821927851286
16 7570508171686
17 70115797179348
18 652594351781036
19 6100765243003922
20 57259681174637899
21 539353919732122101
22 5097036850039818860

List of values

[1, 4, 10, 60, 358, 2798, 22249, 186765, 1596162, 13907330, 122758794, 1096122478, 9880366438, 89796245827, 821927851286, 7570508171686, 70115797179348, 652594351781036, 6100765243003922, 57259681174637899, 539353919732122101, 5097036850039818860]

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

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