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A181930 Triangle T(d,k), where T(d,k)/lcm(1..d) gives the probability that d is the k-th divisor of an integer.

Table of values

n a(n)
1 1
2 0
3 1
4 0
5 1
6 1
7 0
8 0
9 2
10 1
11 0
12 4
13 4
14 3
15 1
16 0
17 0
18 0
19 4
20 5
21 1
22 0
23 16
24 20
25 12
26 6
27 5
28 1
29 0
30 0
31 0
32 48
33 20
34 26
35 10
36 1
37 0
38 0
39 96
40 40
41 52
42 44
43 36
44 11
45 1
46 0
47 0
48 0
49 72
50 48
51 66
52 34
53 22
54 9
55 1
56 0
57 576
58 720
59 392
60 384
61 188
62 154
63 70
64 26
65 9
66 1
67 0
68 0
69 0
70 0
71 0
72 480
73 848
74 560

List of values

[1, 0, 1, 0, 1, 1, 0, 0, 2, 1, 0, 4, 4, 3, 1, 0, 0, 0, 4, 5, 1, 0, 16, 20, 12, 6, 5, 1, 0, 0, 0, 48, 20, 26, 10, 1, 0, 0, 96, 40, 52, 44, 36, 11, 1, 0, 0, 0, 72, 48, 66, 34, 22, 9, 1, 0, 576, 720, 392, 384, 188, 154, 70, 26, 9, 1, 0, 0, 0, 0, 0, 480, 848, 560]

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