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.

A308401 Number of bracelets (turnover necklaces) of length n that have no reflection symmetry and consist of 6 white beads and n-6 black beads.

Table of values

n a(n)
9 3
10 6
11 16
12 30
13 56
14 91
15 150
16 224
17 336
18 477
19 672
20 912
21 1233
22 1617
23 2112
24 2700
25 3432
26 4290
27 5340
28 6552
29 8008
30 9678
31 11648
32 13888
33 16503
34 19448
35 22848
36 26658
37 31008
38 35853
39 41346
40 47424
41 54264
42 61803
43 70224
44 79464
45 89733
46 100947
47 113344
48 126840
49 141680
50 157780
51 175416
52 194480
53 215280
54 237708

List of values

[3, 6, 16, 30, 56, 91, 150, 224, 336, 477, 672, 912, 1233, 1617, 2112, 2700, 3432, 4290, 5340, 6552, 8008, 9678, 11648, 13888, 16503, 19448, 22848, 26658, 31008, 35853, 41346, 47424, 54264, 61803, 70224, 79464, 89733, 100947, 113344, 126840, 141680, 157780, 175416, 194480, 215280, 237708]

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

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