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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.

A195418 a(n) = phi(C(n)) / gcd(C(n)-1, phi(C(n))), where C(n) is the n-th Cullen number.

Table of values

n a(n)
0 1
1 1
2 3
3 5
4 3
5 33
6 5
7 33
8 341
9 1045
10 189
11 1299
12 891
13 4437
14 9477
15 581
16 3855
17 105525
18 27825
19 23751
20 173043
21 10531345
22 56511
23 2386125
24 380955
25 256861
26 24926139
27 5108467
28 32397379
29 930343095
30 930291
31 36512775

List of values

[1, 1, 3, 5, 3, 33, 5, 33, 341, 1045, 189, 1299, 891, 4437, 9477, 581, 3855, 105525, 27825, 23751, 173043, 10531345, 56511, 2386125, 380955, 256861, 24926139, 5108467, 32397379, 930343095, 930291, 36512775]

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

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