cp's OEIS Frontend

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.

A073846 a(1) = 1; thereafter, every even-indexed term is prime and every odd-indexed term is composite.

Table of values

n a(n)
1 1
2 2
3 4
4 3
5 6
6 5
7 8
8 7
9 9
10 11
11 10
12 13
13 12
14 17
15 14
16 19
17 15
18 23
19 16
20 29
21 18
22 31
23 20
24 37
25 21
26 41
27 22
28 43
29 24
30 47
31 25
32 53
33 26
34 59
35 27
36 61
37 28
38 67
39 30
40 71
41 32
42 73
43 33
44 79
45 34
46 83
47 35
48 89
49 36
50 97
51 38
52 101
53 39
54 103
55 40
56 107
57 42
58 109
59 44
60 113
61 45
62 127
63 46
64 131
65 48
66 137
67 49
68 139
69 50

List of values

[1, 2, 4, 3, 6, 5, 8, 7, 9, 11, 10, 13, 12, 17, 14, 19, 15, 23, 16, 29, 18, 31, 20, 37, 21, 41, 22, 43, 24, 47, 25, 53, 26, 59, 27, 61, 28, 67, 30, 71, 32, 73, 33, 79, 34, 83, 35, 89, 36, 97, 38, 101, 39, 103, 40, 107, 42, 109, 44, 113, 45, 127, 46, 131, 48, 137, 49, 139, 50]

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

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