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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.

A256232 Multiplicative with a(2^e) = 1-e, a(3^e) = 1, a(p^e) = e+1 if p>3.

Table of values

n a(n)
1 1
2 0
3 1
4 -1
5 2
6 0
7 2
8 -2
9 1
10 0
11 2
12 -1
13 2
14 0
15 2
16 -3
17 2
18 0
19 2
20 -2
21 2
22 0
23 2
24 -2
25 3
26 0
27 1
28 -2
29 2
30 0
31 2
32 -4
33 2
34 0
35 4
36 -1
37 2
38 0
39 2
40 -4
41 2
42 0
43 2
44 -2
45 2
46 0
47 2
48 -3
49 3
50 0
51 2
52 -2
53 2
54 0
55 4
56 -4
57 2
58 0
59 2
60 -2
61 2
62 0
63 2
64 -5
65 4
66 0
67 2
68 -2
69 2
70 0
71 2
72 -2
73 2
74 0
75 3
76 -2
77 4
78 0
79 2
80 -6

List of values

[1, 0, 1, -1, 2, 0, 2, -2, 1, 0, 2, -1, 2, 0, 2, -3, 2, 0, 2, -2, 2, 0, 2, -2, 3, 0, 1, -2, 2, 0, 2, -4, 2, 0, 4, -1, 2, 0, 2, -4, 2, 0, 2, -2, 2, 0, 2, -3, 3, 0, 2, -2, 2, 0, 4, -4, 2, 0, 2, -2, 2, 0, 2, -5, 4, 0, 2, -2, 2, 0, 2, -2, 2, 0, 3, -2, 4, 0, 2, -6]

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