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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.

A166519 a(n) = 1 + 2*(-1)^n + 2*n.

Table of values

n a(n)
0 3
1 1
2 7
3 5
4 11
5 9
6 15
7 13
8 19
9 17
10 23
11 21
12 27
13 25
14 31
15 29
16 35
17 33
18 39
19 37
20 43
21 41
22 47
23 45
24 51
25 49
26 55
27 53
28 59
29 57
30 63
31 61
32 67
33 65
34 71
35 69
36 75
37 73
38 79
39 77
40 83
41 81
42 87
43 85
44 91
45 89
46 95
47 93
48 99
49 97
50 103
51 101
52 107
53 105
54 111
55 109
56 115
57 113
58 119
59 117
60 123
61 121
62 127
63 125
64 131
65 129
66 135

List of values

[3, 1, 7, 5, 11, 9, 15, 13, 19, 17, 23, 21, 27, 25, 31, 29, 35, 33, 39, 37, 43, 41, 47, 45, 51, 49, 55, 53, 59, 57, 63, 61, 67, 65, 71, 69, 75, 73, 79, 77, 83, 81, 87, 85, 91, 89, 95, 93, 99, 97, 103, 101, 107, 105, 111, 109, 115, 113, 119, 117, 123, 121, 127, 125, 131, 129, 135]

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

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