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.

A325144 a(n) = - Sum_{d | n} (-1)^d *a(d) if n != 1, a(1) = 1.

Table of values

n a(n)
0 0
1 1
2 1
3 1
4 0
5 1
6 1
7 1
8 0
9 2
10 1
11 1
12 0
13 1
14 1
15 3
16 0
17 1
18 2
19 1
20 0
21 3
22 1
23 1
24 0
25 2
26 1
27 4
28 0
29 1
30 3
31 1
32 0
33 3
34 1
35 3
36 0
37 1
38 1
39 3
40 0
41 1
42 3
43 1
44 0
45 8
46 1
47 1
48 0
49 2
50 2
51 3
52 0
53 1
54 4
55 3
56 0
57 3
58 1
59 1
60 0
61 1
62 1
63 8
64 0
65 3
66 3
67 1
68 0
69 3
70 3
71 1
72 0
73 1
74 1
75 8
76 0
77 3
78 3
79 1
80 0
81 8
82 1
83 1
84 0
85 3
86 1

List of values

[0, 1, 1, 1, 0, 1, 1, 1, 0, 2, 1, 1, 0, 1, 1, 3, 0, 1, 2, 1, 0, 3, 1, 1, 0, 2, 1, 4, 0, 1, 3, 1, 0, 3, 1, 3, 0, 1, 1, 3, 0, 1, 3, 1, 0, 8, 1, 1, 0, 2, 2, 3, 0, 1, 4, 3, 0, 3, 1, 1, 0, 1, 1, 8, 0, 3, 3, 1, 0, 3, 3, 1, 0, 1, 1, 8, 0, 3, 3, 1, 0, 8, 1, 1, 0, 3, 1]