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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.

A248610 Least k such that (Pi^2)/18 - sum{1/(h^2*C(2h,h)), h = 1..k} < 1/3^n.

Table of values

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

List of values

[1, 1, 2, 2, 3, 3, 4, 5, 5, 6, 7, 7, 8, 9, 9, 10, 11, 12, 12, 13, 14, 15, 15, 16, 17, 18, 18, 19, 20, 21, 21, 22, 23, 24, 24, 25, 26, 27, 27, 28, 29, 30, 30, 31, 32, 33, 34, 34, 35, 36, 37, 37, 38, 39, 40, 40, 41, 42, 43, 44, 44, 45, 46, 47, 47, 48, 49, 50]

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