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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.

A366898 Number of divisors of n*2^n - 1, the Woodall (or Riesel) numbers.

Table of values

n a(n)
1 1
2 2
3 2
4 6
5 4
6 2
7 4
8 4
9 4
10 4
11 6
12 4
13 12
14 10
15 8
16 48
17 8
18 4
19 8
20 4
21 16
22 16
23 8
24 8
25 4
26 8
27 8
28 16
29 24
30 2
31 8
32 4
33 8
34 32
35 8
36 32
37 4
38 8
39 4
40 24
41 16
42 8
43 32
44 8
45 16
46 24
47 40
48 16
49 16
50 8
51 8
52 16
53 24
54 8
55 16
56 8
57 16
58 6
59 32
60 8
61 8
62 16
63 8
64 512
65 48
66 16
67 12
68 48
69 16
70 8
71 8
72 4
73 24
74 16
75 2
76 256

List of values

[1, 2, 2, 6, 4, 2, 4, 4, 4, 4, 6, 4, 12, 10, 8, 48, 8, 4, 8, 4, 16, 16, 8, 8, 4, 8, 8, 16, 24, 2, 8, 4, 8, 32, 8, 32, 4, 8, 4, 24, 16, 8, 32, 8, 16, 24, 40, 16, 16, 8, 8, 16, 24, 8, 16, 8, 16, 6, 32, 8, 8, 16, 8, 512, 48, 16, 12, 48, 16, 8, 8, 4, 24, 16, 2, 256]

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

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