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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.

A381974 Primes of the form Sum_{k >= 0} floor(m/3^k) for some number m.

Table of values

n a(n)
1 2
2 5
3 13
4 17
5 19
6 23
7 31
8 41
9 53
10 59
11 61
12 67
13 71
14 89
15 97
16 101
17 103
18 107
19 127
20 131
21 139
22 149
23 151
24 157
25 163
26 167
27 179
28 191
29 193
30 197
31 211
32 223
33 227
34 229
35 233
36 251
37 257
38 263
39 269
40 277
41 283
42 313
43 317
44 331
45 337
46 349
47 353
48 373
49 379
50 383
51 409
52 419
53 421
54 431
55 439

List of values

[2, 5, 13, 17, 19, 23, 31, 41, 53, 59, 61, 67, 71, 89, 97, 101, 103, 107, 127, 131, 139, 149, 151, 157, 163, 167, 179, 191, 193, 197, 211, 223, 227, 229, 233, 251, 257, 263, 269, 277, 283, 313, 317, 331, 337, 349, 353, 373, 379, 383, 409, 419, 421, 431, 439]