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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.

A195911 a(n) = ceiling(cot(n)).

Table of values

n a(n)
1 1
2 0
3 -7
4 1
5 0
6 -3
7 2
8 0
9 -2
10 2
11 0
12 -1
13 3
14 1
15 -1
16 4
17 1
18 0
19 7
20 1
21 0
22 113
23 1
24 0
25 -7
26 1
27 0
28 -3
29 2
30 0
31 -2
32 2
33 0
34 -1
35 3
36 1
37 -1
38 4
39 1
40 0
41 7
42 1
43 0
44 57
45 1
46 0
47 -8
48 1
49 0
50 -3
51 2
52 0
53 -2
54 2
55 0
56 -1
57 3
58 1
59 -1
60 4
61 1
62 0
63 6
64 1
65 0
66 38
67 1
68 0
69 -8
70 1
71 0
72 -3
73 2
74 0
75 -2
76 2
77 0
78 -1
79 3

List of values

[1, 0, -7, 1, 0, -3, 2, 0, -2, 2, 0, -1, 3, 1, -1, 4, 1, 0, 7, 1, 0, 113, 1, 0, -7, 1, 0, -3, 2, 0, -2, 2, 0, -1, 3, 1, -1, 4, 1, 0, 7, 1, 0, 57, 1, 0, -8, 1, 0, -3, 2, 0, -2, 2, 0, -1, 3, 1, -1, 4, 1, 0, 6, 1, 0, 38, 1, 0, -8, 1, 0, -3, 2, 0, -2, 2, 0, -1, 3]

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