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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.

A186111 a(n) = -n if n odd, a(2n) = 3n if n odd, a(4n) = 2n.

Table of values

n a(n)
1 1
2 -3
3 3
4 -2
5 5
6 -9
7 7
8 -4
9 9
10 -15
11 11
12 -6
13 13
14 -21
15 15
16 -8
17 17
18 -27
19 19
20 -10
21 21
22 -33
23 23
24 -12
25 25
26 -39
27 27
28 -14
29 29
30 -45
31 31
32 -16
33 33
34 -51
35 35
36 -18
37 37
38 -57
39 39
40 -20
41 41
42 -63
43 43
44 -22
45 45
46 -69
47 47
48 -24
49 49
50 -75
51 51
52 -26
53 53
54 -81
55 55
56 -28
57 57
58 -87
59 59
60 -30
61 61
62 -93
63 63

List of values

[1, -3, 3, -2, 5, -9, 7, -4, 9, -15, 11, -6, 13, -21, 15, -8, 17, -27, 19, -10, 21, -33, 23, -12, 25, -39, 27, -14, 29, -45, 31, -16, 33, -51, 35, -18, 37, -57, 39, -20, 41, -63, 43, -22, 45, -69, 47, -24, 49, -75, 51, -26, 53, -81, 55, -28, 57, -87, 59, -30, 61, -93, 63]

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