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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.

A132020 Decimal expansion of Product_{k>=0} (1 - 1/(2*4^k)).

Table of values

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

List of values

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