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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.

A164020 Denominators of Bernoulli numbers interleaved with even numbers.

Table of values

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

List of values

[1, 2, 6, 4, 30, 6, 42, 8, 30, 10, 66, 12, 2730, 14, 6, 16, 510, 18, 798, 20, 330, 22, 138, 24, 2730, 26, 6, 28, 870, 30, 14322, 32, 510, 34, 6, 36, 1919190, 38, 6, 40, 13530, 42, 1806, 44, 690, 46, 282, 48, 46410, 50, 66, 52, 1590, 54, 798, 56, 870, 58, 354, 60, 56786730]