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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.

A194658 a(n) is the maximal prime, such that for all primes x<=a(n) the number of primes in (x/2,x) is less than n.

Table of values

n a(n)
1 2
2 11
3 17
4 29
5 41
6 47
7 59
8 67
9 71
10 97
11 101
12 107
13 109
14 137
15 151
16 167
17 179
18 181
19 191
20 197
21 233
22 239
23 241
24 263
25 269
26 281
27 283
28 311
29 347
30 349
31 367
32 373
33 401
34 409
35 419
36 431
37 433
38 439
39 461
40 487
41 491
42 503
43 521
44 571
45 587
46 593
47 599
48 601
49 607
50 617
51 643
52 647
53 653

List of values

[2, 11, 17, 29, 41, 47, 59, 67, 71, 97, 101, 107, 109, 137, 151, 167, 179, 181, 191, 197, 233, 239, 241, 263, 269, 281, 283, 311, 347, 349, 367, 373, 401, 409, 419, 431, 433, 439, 461, 487, 491, 503, 521, 571, 587, 593, 599, 601, 607, 617, 643, 647, 653]