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A176005 Det(M) where M is an n X n matrix with M(i,j) = floor(cos(i-j)).

Table of values

n a(n)
1 1
2 1
3 0
4 -1
5 -3
6 0
7 3
8 11
9 24
10 45
11 75
12 125
13 175
14 245
15 91
16 24
17 0
18 -24
19 -5
20 -1
21 0
22 1
23 -3
24 -7
25 -11
26 -15
27 -19
28 -23
29 -16
30 -9
31 -5
32 0
33 0
34 0
35 -5
36 -11
37 -24
38 -37
39 -35
40 -33
41 -27
42 -21
43 -11
44 -1
45 13
46 0
47 -13
48 -27
49 -41
50 -55
51 -69
52 0
53 69
54 221
55 485
56 344
57 240
58 136
59 69
60 27
61 -15
62 -32
63 -36

List of values

[1, 1, 0, -1, -3, 0, 3, 11, 24, 45, 75, 125, 175, 245, 91, 24, 0, -24, -5, -1, 0, 1, -3, -7, -11, -15, -19, -23, -16, -9, -5, 0, 0, 0, -5, -11, -24, -37, -35, -33, -27, -21, -11, -1, 13, 0, -13, -27, -41, -55, -69, 0, 69, 221, 485, 344, 240, 136, 69, 27, -15, -32, -36]

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