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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.

A366538 The number of unitary divisors of the exponentially 2^n-numbers (A138302).

Table of values

n a(n)
1 1
2 2
3 2
4 2
5 2
6 4
7 2
8 2
9 4
10 2
11 4
12 2
13 4
14 4
15 2
16 2
17 4
18 2
19 4
20 4
21 4
22 2
23 2
24 4
25 4
26 2
27 8
28 2
29 4
30 4
31 4
32 4
33 2
34 4
35 4
36 2
37 8
38 2
39 4
40 4
41 4
42 2
43 4
44 2
45 4
46 4
47 4
48 2
49 4
50 4
51 4
52 2
53 8
54 2
55 4
56 4
57 4
58 8
59 2
60 4
61 4
62 8
63 2
64 2
65 4
66 4
67 4
68 4
69 8
70 2
71 4
72 2
73 4
74 2
75 8
76 4
77 4
78 4
79 2
80 8
81 4
82 4
83 4
84 4
85 4
86 2
87 4

List of values

[1, 2, 2, 2, 2, 4, 2, 2, 4, 2, 4, 2, 4, 4, 2, 2, 4, 2, 4, 4, 4, 2, 2, 4, 4, 2, 8, 2, 4, 4, 4, 4, 2, 4, 4, 2, 8, 2, 4, 4, 4, 2, 4, 2, 4, 4, 4, 2, 4, 4, 4, 2, 8, 2, 4, 4, 4, 8, 2, 4, 4, 8, 2, 2, 4, 4, 4, 4, 8, 2, 4, 2, 4, 2, 8, 4, 4, 4, 2, 8, 4, 4, 4, 4, 4, 2, 4]

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

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