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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.

A378440 Dirichlet inverse of Möbius transform of A033630, where A033630 is the number of partitions of n into distinct divisors of n.

Table of values

n a(n)
1 1
2 0
3 0
4 0
5 0
6 -1
7 0
8 0
9 0
10 0
11 0
12 -1
13 0
14 0
15 0
16 0
17 0
18 -1
19 0
20 -1
21 0
22 0
23 0
24 -3
25 0
26 0
27 0
28 -1
29 0
30 -2
31 0
32 0
33 0
34 0
35 0
36 -3
37 0
38 0
39 0
40 -2
41 0
42 -1
43 0
44 0
45 0
46 0
47 0
48 -5
49 0
50 0
51 0
52 0
53 0
54 -1
55 0
56 -1
57 0
58 0
59 0
60 -29
61 0
62 0
63 0
64 0
65 0
66 -1
67 0
68 0
69 0
70 0
71 0
72 -19
73 0
74 0
75 0
76 0
77 0
78 0
79 0
80 -3
81 0
82 0
83 0
84 -21
85 0
86 0
87 0
88 -1
89 0
90 -19
91 0
92 0
93 0
94 0
95 0
96 -11
97 0
98 0
99 0
100 -1

List of values

[1, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, -1, 0, -1, 0, 0, 0, -3, 0, 0, 0, -1, 0, -2, 0, 0, 0, 0, 0, -3, 0, 0, 0, -2, 0, -1, 0, 0, 0, 0, 0, -5, 0, 0, 0, 0, 0, -1, 0, -1, 0, 0, 0, -29, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, -19, 0, 0, 0, 0, 0, 0, 0, -3, 0, 0, 0, -21, 0, 0, 0, -1, 0, -19, 0, 0, 0, 0, 0, -11, 0, 0, 0, -1]