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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.

A013606 a(n) = 4^n - prevprime(4^n).

Table of values

n a(n)
1 1
2 3
3 3
4 5
5 3
6 3
7 3
8 15
9 5
10 3
11 3
12 3
13 5
14 57
15 35
16 5
17 41
18 5
19 45
20 87
21 11
22 17
23 21
24 59
25 27
26 47
27 33
28 5
29 27
30 93
31 57
32 59
33 5
34 23
35 35
36 93
37 35
38 15
39 11
40 65
41 57
42 35
43 35
44 299
45 33
46 83
47 3
48 17
49 51
50 15
51 33
52 17
53 117
54 59
55 21
56 75
57 11
58 3
59 5
60 119
61 3
62 59
63 137
64 159
65 5
66 347
67 45
68 113
69 105
70 27
71 111

List of values

[1, 3, 3, 5, 3, 3, 3, 15, 5, 3, 3, 3, 5, 57, 35, 5, 41, 5, 45, 87, 11, 17, 21, 59, 27, 47, 33, 5, 27, 93, 57, 59, 5, 23, 35, 93, 35, 15, 11, 65, 57, 35, 35, 299, 33, 83, 3, 17, 51, 15, 33, 17, 117, 59, 21, 75, 11, 3, 5, 119, 3, 59, 137, 159, 5, 347, 45, 113, 105, 27, 111]

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

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