cp's OEIS Frontend

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.

A053576 Smallest number whose Euler totient is divisible by 2^n.

Table of values

n a(n)
0 1
1 3
2 5
3 15
4 17
5 51
6 85
7 255
8 257
9 771
10 1285
11 3855
12 4369
13 13107
14 21845
15 65535
16 65537
17 196611
18 327685
19 983055
20 1114129
21 3342387
22 5570645
23 16711935
24 16843009
25 50529027
26 84215045
27 252645135
28 286331153
29 858993459
30 1431655765
31 4294967295
32 8589934592
33 17179869184
34 34359738368
35 68719476736
36 137438953472
37 274877906944
38 549755813888
39 1099511627776

List of values

[1, 3, 5, 15, 17, 51, 85, 255, 257, 771, 1285, 3855, 4369, 13107, 21845, 65535, 65537, 196611, 327685, 983055, 1114129, 3342387, 5570645, 16711935, 16843009, 50529027, 84215045, 252645135, 286331153, 858993459, 1431655765, 4294967295, 8589934592, 17179869184, 34359738368, 68719476736, 137438953472, 274877906944, 549755813888, 1099511627776]

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

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