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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.

A104103 a(n) = ceiling(sqrt(prime(n))).

Table of values

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

List of values

[2, 2, 3, 3, 4, 4, 5, 5, 5, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9, 9, 10, 10, 10, 11, 11, 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 19, 19, 19, 19, 19, 19]

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