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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.

A065389 Numbers m such that sigma(phi(m)) sets a new record, i.e., sigma(phi(m)) > sigma(phi(k)) for all k < m numbers.

Table of values

n a(n)
1 1
2 3
3 5
4 7
5 11
6 13
7 17
8 19
9 25
10 29
11 31
12 37
13 43
14 53
15 61
16 73
17 97
18 109
19 127
20 143
21 151
22 157
23 181
24 211
25 241
26 313
27 331
28 337
29 397
30 403
31 421
32 527
33 541
34 601
35 631
36 661
37 757
38 779
39 899
40 1009
41 1147
42 1201
43 1321
44 1333
45 1517
46 1621
47 1763
48 1801
49 2017
50 2161
51 2341
52 2501
53 2521

List of values

[1, 3, 5, 7, 11, 13, 17, 19, 25, 29, 31, 37, 43, 53, 61, 73, 97, 109, 127, 143, 151, 157, 181, 211, 241, 313, 331, 337, 397, 403, 421, 527, 541, 601, 631, 661, 757, 779, 899, 1009, 1147, 1201, 1321, 1333, 1517, 1621, 1763, 1801, 2017, 2161, 2341, 2501, 2521]

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

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