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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.

A242189 a(n) is the smallest prime number such that every even number from 6 to 2n can be written as the sum of two primes less than or equal to a(n).

Table of values

n a(n)
3 3
4 5
5 5
6 7
7 7
8 11
9 11
10 13
11 13
12 13
13 13
14 17
15 17
16 19
17 19
18 19
19 19
20 23
21 23
22 31
23 31
24 31
25 31
26 31
27 31
28 37
29 37
30 37
31 37
32 41
33 41
34 41
35 41
36 41
37 41
38 47
39 47
40 47
41 47
42 47
43 47
44 47
45 47
46 61
47 61
48 61
49 61
50 61
51 61
52 61
53 61
54 61
55 67
56 67
57 67
58 73
59 73
60 73
61 73
62 73
63 73
64 73
65 73
66 73
67 73
68 83

List of values

[3, 5, 5, 7, 7, 11, 11, 13, 13, 13, 13, 17, 17, 19, 19, 19, 19, 23, 23, 31, 31, 31, 31, 31, 31, 37, 37, 37, 37, 41, 41, 41, 41, 41, 41, 47, 47, 47, 47, 47, 47, 47, 47, 61, 61, 61, 61, 61, 61, 61, 61, 61, 67, 67, 67, 73, 73, 73, 73, 73, 73, 73, 73, 73, 73, 83]

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

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