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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.

A307328 Indices of prime Ulam numbers: numbers k such that A002858(k) is prime.

Table of values

n a(n)
1 2
2 3
3 7
4 8
5 15
6 17
7 25
8 31
9 41
10 48
11 69
12 73
13 91
14 97
15 106
16 107
17 123
18 125
19 138
20 167
21 172
22 177
23 181
24 193
25 194
26 241
27 242
28 246
29 267
30 280
31 286
32 287
33 297
34 306
35 312
36 322
37 323
38 338
39 340
40 343
41 353
42 354
43 382
44 388
45 393
46 398
47 403
48 411
49 412
50 415
51 416
52 433
53 444
54 448
55 460

List of values

[2, 3, 7, 8, 15, 17, 25, 31, 41, 48, 69, 73, 91, 97, 106, 107, 123, 125, 138, 167, 172, 177, 181, 193, 194, 241, 242, 246, 267, 280, 286, 287, 297, 306, 312, 322, 323, 338, 340, 343, 353, 354, 382, 388, 393, 398, 403, 411, 412, 415, 416, 433, 444, 448, 460]