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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.

A043298 Numbers n such that B(6*n) has denominator 42 where B(2k) are the Bernoulli numbers.

Table of values

n a(n)
1 1
2 19
3 31
4 43
5 59
6 67
7 71
8 79
9 97
10 109
11 127
12 139
13 149
14 157
15 163
16 167
17 193
18 197
19 199
20 211
21 223
22 227
23 229
24 269
25 307
26 317
27 337
28 349
29 353
30 361
31 379
32 383
33 389
34 401
35 409
36 421
37 433
38 439
39 449
40 457
41 463
42 479
43 487
44 499
45 521
46 523
47 541
48 547
49 563
50 569
51 571
52 587
53 589
54 599

List of values

[1, 19, 31, 43, 59, 67, 71, 79, 97, 109, 127, 139, 149, 157, 163, 167, 193, 197, 199, 211, 223, 227, 229, 269, 307, 317, 337, 349, 353, 361, 379, 383, 389, 401, 409, 421, 433, 439, 449, 457, 463, 479, 487, 499, 521, 523, 541, 547, 563, 569, 571, 587, 589, 599]