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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.

A051464 Number of divisors of 4*(2^n-1) + 1.

Table of values

n a(n)
1 2
2 2
3 2
4 2
5 4
6 4
7 2
8 2
9 4
10 2
11 4
12 2
13 4
14 6
15 4
16 4
17 16
18 2
19 4
20 2
21 4
22 2
23 4
24 8
25 12
26 8
27 2
28 4
29 8
30 4
31 4
32 4
33 4
34 4
35 4
36 8
37 8
38 4
39 8
40 16
41 8
42 4
43 8
44 8
45 6
46 16
47 8
48 8
49 8
50 16
51 8
52 4
53 32
54 32
55 8
56 4
57 8
58 4
59 4
60 8
61 16
62 8
63 8
64 16
65 48
66 16
67 16
68 8
69 4
70 16
71 4
72 16
73 16
74 8
75 8
76 8
77 16
78 16
79 8
80 16
81 32

List of values

[2, 2, 2, 2, 4, 4, 2, 2, 4, 2, 4, 2, 4, 6, 4, 4, 16, 2, 4, 2, 4, 2, 4, 8, 12, 8, 2, 4, 8, 4, 4, 4, 4, 4, 4, 8, 8, 4, 8, 16, 8, 4, 8, 8, 6, 16, 8, 8, 8, 16, 8, 4, 32, 32, 8, 4, 8, 4, 4, 8, 16, 8, 8, 16, 48, 16, 16, 8, 4, 16, 4, 16, 16, 8, 8, 8, 16, 16, 8, 16, 32]

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