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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.

A098202 a(n) is the length of the iteration trajectory when the cototient function (A051953) is applied to the n-th primorial number (A002110(n)).

Table of values

n a(n)
1 3
2 5
3 8
4 12
5 18
6 20
7 31
8 32
9 41
10 43
11 61
12 65
13 80
14 77
15 95
16 125
17 131
18 125
19 157
20 173
21 140
22 192
23 195
24 221
25 213
26 212
27 261
28 269
29 277
30 300
31 296
32 321
33 336
34 329
35 358
36 367
37 379
38 405
39 428
40 439
41 438
42 464
43 477
44 493
45 506
46 454
47 491
48 542
49 564
50 588
51 543
52 600
53 639
54 660

List of values

[3, 5, 8, 12, 18, 20, 31, 32, 41, 43, 61, 65, 80, 77, 95, 125, 131, 125, 157, 173, 140, 192, 195, 221, 213, 212, 261, 269, 277, 300, 296, 321, 336, 329, 358, 367, 379, 405, 428, 439, 438, 464, 477, 493, 506, 454, 491, 542, 564, 588, 543, 600, 639, 660]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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