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.

A078925 Triangle of T1(n,m) = number of bracelets (necklaces that can be turned over) with m white beads and (2n+1-m) black ones, for 1<=m<=n.

Table of values

n a(n)
1 1
2 1
3 2
4 1
5 3
6 4
7 1
8 4
9 7
10 10
11 1
12 5
13 10
14 20
15 26
16 1
17 6
18 14
19 35
20 57
21 76
22 1
23 7
24 19
25 56
26 111
27 185
28 232
29 1
30 8
31 24
32 84
33 196
34 392
35 600
36 750
37 1
38 9
39 30
40 120
41 324
42 756
43 1368
44 2052
45 2494
46 1
47 10
48 37
49 165
50 507
51 1353
52 2829
53 4950
54 7105
55 8524
56 1
57 11
58 44
59 220
60 759
61 2277
62 5412
63 10824

List of values

[1, 1, 2, 1, 3, 4, 1, 4, 7, 10, 1, 5, 10, 20, 26, 1, 6, 14, 35, 57, 76, 1, 7, 19, 56, 111, 185, 232, 1, 8, 24, 84, 196, 392, 600, 750, 1, 9, 30, 120, 324, 756, 1368, 2052, 2494, 1, 10, 37, 165, 507, 1353, 2829, 4950, 7105, 8524, 1, 11, 44, 220, 759, 2277, 5412, 10824]