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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.

A106458 Bernoulli number denominators, with zeros at the odd places.

Table of values

n a(n)
0 1
1 2
2 6
3 0
4 30
5 0
6 42
7 0
8 30
9 0
10 66
11 0
12 2730
13 0
14 6
15 0
16 510
17 0
18 798
19 0
20 330
21 0
22 138
23 0
24 2730
25 0
26 6
27 0
28 870
29 0
30 14322
31 0
32 510
33 0
34 6
35 0
36 1919190
37 0
38 6
39 0
40 13530
41 0
42 1806
43 0
44 690
45 0
46 282
47 0
48 46410
49 0
50 66
51 0
52 1590
53 0
54 798
55 0
56 870
57 0
58 354
59 0
60 56786730

List of values

[1, 2, 6, 0, 30, 0, 42, 0, 30, 0, 66, 0, 2730, 0, 6, 0, 510, 0, 798, 0, 330, 0, 138, 0, 2730, 0, 6, 0, 870, 0, 14322, 0, 510, 0, 6, 0, 1919190, 0, 6, 0, 13530, 0, 1806, 0, 690, 0, 282, 0, 46410, 0, 66, 0, 1590, 0, 798, 0, 870, 0, 354, 0, 56786730]