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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.

A316566 Triangle read by rows: T(n,k) is the number of elements of the group GL(2, Z(n)) with order k, 1 <= k <= A316565(n).

Table of values

n a(n)
1 1
2 1
3 3
4 2
5 1
6 13
7 8
8 6
9 0
10 8
11 0
12 12
13 1
14 27
15 8
16 36
17 0
18 24
19 1
20 31
21 20
22 152
23 24
24 20
25 0
26 40
27 0
28 24
29 0
30 40
31 0
32 0
33 0
34 0
35 0
36 0
37 0
38 48
39 0
40 0
41 0
42 80
43 1
44 55
45 26
46 24
47 0
48 98
49 0
50 48
51 0
52 0
53 0
54 12
55 0
56 0
57 0
58 0
59 0
60 0
61 0
62 0
63 0
64 0
65 0
66 24
67 1
68 57
69 170
70 42
71 0
72 618
73 48
74 84
75 0
76 0
77 0
78 84

List of values

[1, 1, 3, 2, 1, 13, 8, 6, 0, 8, 0, 12, 1, 27, 8, 36, 0, 24, 1, 31, 20, 152, 24, 20, 0, 40, 0, 24, 0, 40, 0, 0, 0, 0, 0, 0, 0, 48, 0, 0, 0, 80, 1, 55, 26, 24, 0, 98, 0, 48, 0, 0, 0, 12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 24, 1, 57, 170, 42, 0, 618, 48, 84, 0, 0, 0, 84]

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