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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.

A039786 phi(a(n)) is equal to the multiplicative projection of (a(n)-1).

Table of values

n a(n)
1 2
2 3
3 5
4 7
5 9
6 11
7 13
8 23
9 29
10 31
11 43
12 47
13 53
14 59
15 61
16 67
17 71
18 79
19 83
20 103
21 107
22 131
23 139
24 149
25 157
26 167
27 173
28 179
29 191
30 211
31 223
32 227
33 229
34 239
35 263
36 269
37 277
38 283
39 293
40 311
41 317
42 331
43 347
44 349
45 359
46 367
47 373
48 383
49 389
50 419
51 421
52 431
53 439
54 443
55 461
56 463
57 467
58 479

List of values

[2, 3, 5, 7, 9, 11, 13, 23, 29, 31, 43, 47, 53, 59, 61, 67, 71, 79, 83, 103, 107, 131, 139, 149, 157, 167, 173, 179, 191, 211, 223, 227, 229, 239, 263, 269, 277, 283, 293, 311, 317, 331, 347, 349, 359, 367, 373, 383, 389, 419, 421, 431, 439, 443, 461, 463, 467, 479]