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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.

A268353 a(n) is the exponent of 2 corresponding to the n-th Proth prime.

Table of values

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

List of values

[1, 2, 2, 4, 3, 5, 4, 6, 4, 8, 5, 6, 6, 7, 5, 8, 5, 7, 6, 7, 6, 6, 7, 6, 6, 8, 7, 7, 7, 7, 7, 9, 8, 8, 7, 7, 7, 9, 7, 9, 7, 12, 10, 7, 7, 8, 8, 7, 10, 7, 9, 11, 10, 8, 9, 8, 10, 9, 8, 8, 8, 9, 8, 9, 8, 10, 10, 8, 13, 8, 8, 9, 8, 8, 8, 10, 9, 8, 8, 10, 11]

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