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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.

A055377 a(n) = largest prime <= n/2.

Table of values

n a(n)
4 2
5 2
6 3
7 3
8 3
9 3
10 5
11 5
12 5
13 5
14 7
15 7
16 7
17 7
18 7
19 7
20 7
21 7
22 11
23 11
24 11
25 11
26 13
27 13
28 13
29 13
30 13
31 13
32 13
33 13
34 17
35 17
36 17
37 17
38 19
39 19
40 19
41 19
42 19
43 19
44 19
45 19
46 23
47 23
48 23
49 23
50 23
51 23
52 23
53 23
54 23
55 23
56 23
57 23
58 29
59 29
60 29
61 29
62 31
63 31
64 31
65 31
66 31
67 31
68 31
69 31
70 31
71 31
72 31
73 31
74 37
75 37
76 37
77 37
78 37

List of values

[2, 2, 3, 3, 3, 3, 5, 5, 5, 5, 7, 7, 7, 7, 7, 7, 7, 7, 11, 11, 11, 11, 13, 13, 13, 13, 13, 13, 13, 13, 17, 17, 17, 17, 19, 19, 19, 19, 19, 19, 19, 19, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 29, 29, 29, 29, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 37, 37, 37, 37, 37]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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