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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.

A254445 Decimal expansion of Sum_{n>=0} 1/cosh(n).

Table of values

n a(n)
1 2
2 0
3 7
4 1
5 1
6 2
7 1
8 3
9 2
10 9
11 9
12 6
13 7
14 8
15 2
16 3
17 1
18 6
19 9
20 5
21 7
22 1
23 5
24 7
25 2
26 9
27 9
28 2
29 6
30 8
31 3
32 5
33 2
34 6
35 2
36 6
37 0
38 8
39 9
40 3
41 7
42 9
43 4
44 6
45 5
46 8
47 3
48 0
49 6
50 9
51 3
52 0
53 7
54 5
55 5
56 8
57 1
58 5
59 6
60 5
61 0
62 6
63 6
64 1
65 1
66 1
67 4
68 4
69 5
70 1
71 2
72 2
73 6
74 6
75 1
76 2
77 2
78 6
79 2
80 9
81 3
82 7
83 3
84 2
85 7
86 1
87 2
88 5
89 0
90 0
91 2
92 2
93 2
94 9
95 5
96 0
97 5
98 2
99 8
100 5
101 5
102 6
103 4
104 6
105 7

List of values

[2, 0, 7, 1, 1, 2, 1, 3, 2, 9, 9, 6, 7, 8, 2, 3, 1, 6, 9, 5, 7, 1, 5, 7, 2, 9, 9, 2, 6, 8, 3, 5, 2, 6, 2, 6, 0, 8, 9, 3, 7, 9, 4, 6, 5, 8, 3, 0, 6, 9, 3, 0, 7, 5, 5, 8, 1, 5, 6, 5, 0, 6, 6, 1, 1, 1, 4, 4, 5, 1, 2, 2, 6, 6, 1, 2, 2, 6, 2, 9, 3, 7, 3, 2, 7, 1, 2, 5, 0, 0, 2, 2, 2, 9, 5, 0, 5, 2, 8, 5, 5, 6, 4, 6, 7]