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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.

A100371 a(n) = 2^phi(n) - 1 = A066781(n) - 1.

Table of values

n a(n)
1 1
2 1
3 3
4 3
5 15
6 3
7 63
8 15
9 63
10 15
11 1023
12 15
13 4095
14 63
15 255
16 255
17 65535
18 63
19 262143
20 255
21 4095
22 1023
23 4194303
24 255
25 1048575
26 4095
27 262143
28 4095
29 268435455
30 255
31 1073741823
32 65535
33 1048575
34 65535
35 16777215
36 4095
37 68719476735
38 262143
39 16777215
40 65535

List of values

[1, 1, 3, 3, 15, 3, 63, 15, 63, 15, 1023, 15, 4095, 63, 255, 255, 65535, 63, 262143, 255, 4095, 1023, 4194303, 255, 1048575, 4095, 262143, 4095, 268435455, 255, 1073741823, 65535, 1048575, 65535, 16777215, 4095, 68719476735, 262143, 16777215, 65535]

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

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